SSC CGL 2017 Science(Physics) Mission SSC CGL 2018

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1 Q1. Which of the following instrument is used to measure Soil Water Tension? भ द भ जर तन व भ ऩन क लरए मह प रम ग ककए ज न व र म त र क क म कह ज त ह? SSC CGL 5-august Photometer प रक शभ ऩ 2.Pyrometer उत त ऩभ ऩ 3.Psychrometer श ष क द रत भ ऩ 4.Tensiometer तन वभ ऩ Correct Answer: Tensiometer तन वभ ऩ A photometer is an instrument that measures light intensity or the optical properties of solutions or surfaces. A pyrometer is a type of remote-sensing thermometer used to measure the temperature of a surface. A psychrometer measures the relative humidity in the atmosphere through the use of two thermometers Q2. What is the SI unit of Force? फर क SI भ त रक क म ह? 1.Pascal ऩ स कर 2.Boyle फ मर 3.Newton न म टन 4.Watt व ट Correct Answer: Newton न म टन SSC CGL 5-august-2017 Q3. Which of the following device is best suited for measuring the temperature inside metallurgical furnaces? लनम नलरख त भ स क न स म त र ध त बखटटम क अ दय क त ऩभ न क भ ऩन क लरए सफस उल त ह? 1.Pyrometer ऩ मय भ टय 2.Thermocouple थभ कऩर 3.Thermometer थभ भ टय 4.Thermistor थलभ स टय Correct Answer: Pyrometer ऩ मय भ टय SSC CGL 8-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 1

2 A pyrometer is a type of remote-sensing thermometer used to measure the temperature of a surface from a distance. A thermocouple (two dissimilar electrical conductors forming electrical junctions at differing temperatures )produces a temperature-dependent voltage as a result of the thermoelectric effect, and this voltage can be interpreted to measure temperature. A thermistor is a type of resistor whose resistance is dependent on temperature. Measure limited temperature range, between 90 C to 130 C. Q4. Which one of the following is a bad Thermal Conductor? लनम नलरख त भ स क न-स एक फ य ऊष भ ऩरय रक ह? 1.Aluminium एल म भ लनमभ 2.Copper त फ 3.Glass श श 4.Silver द Correct Answer: Glass श श SSC CGL 5-august-2017 Thermal conductivity is the property of a material to conduct heat. Heat transfer occurs at a lower rate across materials of low thermal conductivity than across materials of high thermal conductivity. Q5. Who invented first working laser? ऩहर क भ कयन व र र जय क आववष क य ककसन ककम थ? 1.A. H. Taylor A H ट रय 2.W. K. Roentgen W K य टजन 3.T. H. Maiman T H भ भन 4.Fred Morrission फ र ड भ रयसन Correct Answer: T. H. Maiman T H भ भन Q6. What is the minimum distance (in metres) required to hear an echo? प रलतध वलन स नन क लरए न म नतभ द य भ टय भ ककतन ह न कहए? SSC CGL 5-august Correct Answer: 17 Q7. Why does a black board appears black in colour? एक श म भऩटट य ग भ क र क म कद ई द त ह? SSC CGL 5-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 2

3 1.It reflects black colour वह क र य ग प रलतवफ वफत कयत ह 2.It absorbs black colour वह क र य ग अवश वषत कयत ह 3.It reflects all colours वह स य य ग प रलतवफ वफत कयत ह 4.It absorbs all the colours वह स य य ग अवश वषत कयत ह Correct Answer: It absorbs all the colours वह स य य ग अवश वषत कयत ह SSC CGL 5-august-2017 A black object may look black, but, technically, it may still be reflecting some light. For example, a black pigment results from a combination of several pigments that collectively absorb most colors. So when light falls on it board absorbs all colours because all are present so no light is reflected back. Q8. Meter in a vehicle that calculates distance covered by the vehicle is called. वह भ टय ज व हन द व य तम क गई द य क भ ऩत ह उस क म कह ज त ह? 1.Speedometer रभ ऩ 2.Odometer ऩथभ ऩ 3.Thermometer थभ भ टय 4.Kilometre ककर भ टय Correct Answer: Odometer ऩथभ ऩ Q9. What is the SI unit of pressure? द फ क आईएएस भ त रक क क म कहत ह? 1.Newton न म टन 2.Weber फ वय 3.Pascal ऩ स कर 4.Henry ह नय Correct Answer: Pascal ऩ स कर Weber is the SI unit of magnetic flux The henry is the SI derived unit of electrical inductance Q10. Who invented bluetooth? ब र ट थ क आववष क य ककसन ककम थ? 1.Kirkpatrick Macmillan ककक ऩ क क भ कलभरन 2.Benjamin Franklin फ ज लभन फ र खक रन SSC CGL 6-august-2017 SSC CGL 6-august-2017 SSC CGL 6-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 3

4 3.Dr. Jaap Haartsen ड क टय ज ऩ ह त स न 4.Charles Babbage ल स फ फ ज Correct Answer: Dr. Jaap Haartsen ड क टय ज ऩ ह त स न Q11. Reflection from a smooth surface like that of a mirror is called reflection. दऩ ण ज स ल कन ऩ ष स ह न व र ऩय वत न क क न स ऩय वत न कहत ह? 1.regular लनमलभत 2.irregular अलनमलभत 3.diffused ववसरयत 4.fused स गलरत Correct Answer: regular लनमलभत SSC CGL 6-august-2017 Regular reflection: Reflection such that the angle of reflection of the light is equal to the angle of incidence and on the opposite side of the normal to the point of incidence. Diffuse reflection is the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle. Q12. What is the unit of resistance? प रलतय ध क भ ऩन क इक ई क म ह? 1.ohm ओह म 2.farad प यड 3.henry ह नय 4.weber व फय Correct Answer: ohm ओह म The farad is the SI derived unit of electrical capacitance Q13. Who invented the vacuum pump? लनव त ऩ ऩ क आववष क य ककसन ककम? 1.Otto von Guericke ओटट व न ग रयक 2.Cai Lun क र न 3.Melitta Bentz भ लरट फ टज़ 4.William Henry Fox Talbot ववलरमभ ह नय प क स ट रफ ट Correct Answer: Otto von Guericke ओटट व न ग रयक SSC CGL 6-august-2017 SSC CGL 6-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 4

5 Q14. What is the other name of Galileo s law of falling bodies? ग र लरम क लगयत शय य क लनमभ क औय ककस न भ स ज न ज त ह? 1.Law of motion गलत क लनमभ 2.Newton s first law न म टन क ऩहर लनमभ 3.Newton s second law न म टन क द सय लनमभ 4.Newton s third law न म टन क त सय लनमभ Correct Answer: Newton s first law गलत क लनमभ SSC CGL 8-august-2017 Galileo s law of falling bodies :- Bodies fall on the surface of the earth at a constant acceleration, and that the force of gravity which causes all bodies to move downward is a constant force. Q15. Which of the following device is used to measure humidity? लनम नलरख त भ स क न स म त र क प रम ग आद रत भ ऩन क लरए ककम ज त ह? 1. Hydrometer द रवघनत वभ ऩ 2.Hygrometer आद र त भ ऩ 3.Psycho Meter भन भ नभ ऩ 4.Anemometer ऩवनव गभ ऩ Correct Answer: Hygrometer आद र त भ ऩ SSC CGL 8-august-2017 A hydrometer or areometer is an instrument that measures the specific gravity (relative density) of liquids the ratio of the density of the liquid to the density of water Q16. Which of the following is not a vector quantity? लनम नलरख त भ स क न एक सकदश भ त र नह ह? SSC CGL 8-august Momentum आव ग 2.Displacement ववस थ ऩन 3.Torque फर आघ ण 4.Speed गलत Correct Answer: Speed गलत Q17. At what temperature (in Fahrenheit) pure water freezes? श द ध जर ककस त ऩभ न (प य नह इट भ ) ऩय जभ ज त ह? 5 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 5

6 Correct Answer: 32 Water freezes at 32 degrees Fahrenheit, 0 degrees Celsius, Kelvin. SSC CGL 8-august-2017 Q18. Who invented Dynamite? ड मन भ इट क आववष क य ककसन ककम? SSC CGL 8-august J B Dunlop ज फ डनरऩ 2.Alfred Nobel अल फ र ड न फर 3.James Simons ज म स लसभ न स 4.Peter Hargreaves ऩ टय हयग र वस Correct Answer: Alfred Nobel अल फ र ड न फर Q19. Which of the following is not a vector quantity? लनम नलरख त भ स क न एक सकदश भ त र नह ह? SSC CGL 8-august Acceleration त वयण 2.Electric current ववद य त ध य 3.Force फर 4.Velocity स व ग Correct Answer: Electric current ववद य त ध य Q20. The phenomena of raising the outer edge of the curved roads above the inner edge to provide necessary centripetal force to the vehicles to take a safe turn is called. व हन क स यख त भ ड र न क लरए आवश मक क द र म फर प रद न कयन ह त ककस घ भ वद य सड क क फ हय ककन य क आ तरयक ककन य स ऊऩय कयन क प रक म क क म कहत ह? 1.banking of roads ढ र सड क (सड क क फ कक ग) 2.cornering of roads सड क क क न रय ग 3.elevation of roads सड क क ऊ कयन SSC CGL 8-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 6

7 4.tempering of roads सड क क ट ऩरय ग Correct Answer: banking of roads ढ र सड क (सड क क फ कक ग) If the road is banked, so that the outer edge is above the inner edge, then a portion of the normal force from the road on the tires points towards the center of the track; this fraction of the normal force can provide enough centripetal force to keep the car moving in a circle. Q21. The bending of light when it passes around a corner or a slit is due to. जफ प रक श ककस ककन य म ककस दय य स ह कय ग जयत ह त मह ककस वजह स व ककत (Bend) ह ज त ह 1.reflection प रलतवफ फ 2.refraction अऩवत न 3.diffraction वववत न 4.total internal reflection ऩ ण आ तरयक प रलतवफ फ Correct Answer: diffraction वववत न SSC CGL 9-august-2017 The ability of light to bend around corners is also known as diffraction Refraction is the change in direction of waves that occurs when waves travel from one medium to another. Refraction is always accompanied by a wavelength and speed change. Diffraction is the bending of waves around obstacles and openings. The amount of diffraction increases with increasing wavelength. Q22. What is the reason for formation of Mirage in desert? भर स थर भ भय ल क म भयफ क ष ण फनन क भ ख म क यण क म ह? 1.Refraction of light प रक श क अऩवत न 2.Reflection of light प रक श क प रलतवफ फ 3.Total internal reflection of light प रक श क ऩ ण आ तरयक प रलतवफ फ 4.Both Refraction and Total internal reflection of light प रक श क अऩवत न तथ ऩ ण आ तरयक प रलतवफ फ द न SSC CGL 9-august-2017 Correct Answer: Total internal reflection of light Mirage occurs due to total internal reflection of light. When the sun is high in the sky, the sand gets heated first and then the layers of air above it. The rays from the trees travel from an optically denser air layer to a rarer layer and hence bend away from the normal. This bending continues and a stage is reached where the angle of incidence becomes greater than the critical angle and total internal reflection takes place. 7 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 7

8 Q23. Who discovered television? ट र ववजन क आववष क य ककसन ककम थ? SSC CGL 9-august Michael Faraday भ इकर प य ड 2.Joseph Henry ज स प ह नय अब फ 3.Abbe Caselli कस लरन 4.John Baird ज न फ मड Correct Answer: John Baird ज न फ मड Q24. It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement? स वत त र र ऩ स रटक ह ए रकड क एक ढ भ क र ठ कन ककठन ह त ह क न स लनमभ इस कथन क सभथ न कयत ह? 1.Law of inertia जड त क लनमभ 2.Newton s second law न म टन क द सय लनमभ 3.Newton s third law न म टन क त सय लनमभ 4.Pascal s law ऩ स कर क लनमभ Correct Answer: Newton s third law न म टन क त सय लनमभ SSC CGL 9-august-2017 When the wooden frame is held firmly against a support, and the nail is hit, an equal reaction of the support drives the nail into the block. Q25. Which one of the following is not a property of electromagnetic waves? लनम नलरख त भ स क न-स ववद य त फक म तय ग क ग ण नह ह? 1.Electromagnetic waves do not show interference and diffraction. SSC CGL 9-august-2017 ववद य त फक म तय ग यतमलतकयण तथ वववत न नह कद त ह 2.Oscillating electric field and magnetic field are perpendicular to each other. ववद य त तथ फक म त र एक द सय क र फर ऩ ह त ह 3.Electromagnetic waves are transverse waves ववद य त फक म तय ग अन प रस थ तय ग ह त ह 4.Electromagnetic waves do not require a medium to propagate. ववद य त फक म तय ग क आग फढ न क लरए ककस भ ध मभ क आवश मकत नह ह त 8 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 8

9 Correct Answer: Electromagnetic waves do not show interference and diffraction. Various properties of EM waves:- EM waves are composed of oscillating magnetic and electric fields. EM waves travel with a constant velocity of 3.00 x 108 ms-1 in vacuum. EM waves are transverse waves. This means that they are measured by their amplitude (height) and wavelength (distance between the highest/lowest points of two consecutive waves). Q26. What was invented by Zacharias Jansen? जक रयम स ज नस न न ककसक अववष क य ककम थ? SSC CGL 9-august Jet Engine ज ट इ जन 2.Radium य कडमभ 3.Microscope स क ष भदश 4.Electric Lamp ववद य त र ऩ Correct Answer: Microscope स क ष भदश Q27. Convex mirror is generally used in. स भ न मत उत तर दऩ ण क प रम ग ककसभ ह त ह? 1.solar cookers स य ल ह 2.ophthalmoscope न त र अ तदश 3.reflector for head light अग रद ऩ क प रलत ऩक 4.rear view mirror ऩश चदश दऩ ण SSC CGL 9-august-2017 Correct Answer: rear view mirror Because the image is smaller, more image can fit onto the mirror, so a convex mirror provides for a larger field of view than a plane mirror. the passenger-side rear view mirror on a car is convex. Convex mirrors are a car s side mirrors and security mirrors. Concave mirrors used solar cookers to collect light from a large area into a small area (as in a telescope). Ophthalmoscopy, also called funduscopy, is a test that allows a health professional to see inside the fundus of the eye and other structures using an ophthalmoscope (or funduscope) Q28. What is the SI unit of frequency? आव वत त क SI भ त रक क म ह? SSC CGL 9-august Newton न म टन 9 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 9

10 2.Watt व ट 3.Farad प यड 4.Hertz हटज Correct Answer: Hertz The farad is the SI derived unit of electrical capacitance Q29. Speed of light is maximum in. ककस भ प रक श क गलत सव लधक ह त ह? 1. Vacuum लनव त 2.solids ठ स ऩद थ 3.liquids तयर ऩद थ 4.gases ग स Correct Answer: vacuum लनव त Speed of light as follows:- Vacuum[c]>Air(STP)[99.97%c]>Water[75.1%c]>Human eye[72 to 74%c >Glass[66%c] Where C= m/s SSC CGL 10-august-2017 Q30. What is the SI unit of electric current? ववद य त ध य क एस आई (SI) भ त रक क म ह? 1.Newton न म टन 2.Joule ज र 3.Ampere ए वऩमय 4.Watt व ट Correct Answer: Ampere ए वऩमय SSC CGL 10-august-2017 Electric current is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is measured using a device called an ammeter. Q31. If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used? मकद ऩश चद श म द न व र दऩ ण भ वस त ए फड तथ उल ट कद ई द त ह त ककस प रक य क दऩ ण क प रम ग ककम गम ह? SSC CGL 10-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 10

11 1.Concave अवतर 2.Convex उत तर 3.Cylindrical फ रन क य 4.Plane ऩरयदश Correct Answer: Concave अवतर The image formed by a concave mirror can be real or virtual, enlarged or diminished, and erect or inverted, depending upon the distance of the object from the mirror. Concave mirrors are used in reflecting telescopes, headlamps, automobile headlights and solar cookers to collect light from a large area into a small area (as in a telescope) Q32. Soap bubble attains spherical shape due to. स फ न क फ रफ र ककसक क यण ग र क य प र प त कय र त ह? 1.inertia जड त व 2.pressure द फ 3.surface tension प रष तन व 4.Viscosity श म नत Correct Answer: surface tension प रष तन व SSC CGL 10-august-2017 Bubbles are round spherical because there is an attractive force called surface tension that pulls molecules of water into the tightest possible groupings. In a bubble, the inward surface-tension forces of the water film are exactly balanced by the outwardpushing pressure of the air inside. Q33. Which of the following was invented by Sir Humphry Davy? लनम नलरख त भ स ककसक आववष क य सय ह फ र ड व न ककम थ? SSC CGL 10-august Safety Pin स फ ट वऩन 2.Steam Engine ब ऩ क इ जन 3.Safety Lamp स फ ट र ऩ 4.X-Rays एक स-य Correct Answer: Safety Lamp स फ ट र ऩ Q34. Why does water tank appear shallower when viewed from the top? ऊऩय स द न ऩय ऩ न क ट क उथर क म कद ई द त ह? 11 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 11

12 1.Due to reflection प रलतवफ फ क क यण 2.Due to refraction अऩवत न क क यण 3.Due to diffraction वववत न क क यण 4.Due to total internal reflection क र आ तरयक प रलतवफ फ क क यण Correct Answer: Due to refraction अऩवत न क क यण SSC CGL 10-august-2017 When light enters from one medium to another, due to change in its speed it s path also change i.e. either it bent towards the normal or away from the normal.the water in the pool refracts the light going in and this results in our viewing the pool shallower than it actually is. Q35. Which colour is formed when Red and Green are mixed? र र तथ हय य ग क लभश रण स क न स य ग प र प त ह त ह? 1.Light blue हल क न र 2.Yellow ऩ र 3.White श व त 4.Grey स र ट Correct Answer: Yellow ऩ र SSC CGL 10-august-2017 When red and green combine, the result is yellow. When red and blue combine, the result is magenta. When blue and green combine, the result is cyan. Additive mixing is used in television and computer monitors to produce a wide range of colors using only three primary colors. Q36. At which of the following place, weight of an object is maximum? लनम नलरख त भ स ककस स थ न ऩय एक वस त क ब य सव लधक ह त ह? SSC CGL 11-august At poles ध र व य 2.At equator ब भध म य 3.At tropic of Capricorn भकय य 4.At tropic of cancer कक य Correct Answer: At poles ध र व य As the gravity is slightly higher at the poles, the weight is more as compared to anywhere else Q37. What is the SI unit of temperature? त ऩभ न क SI भ त रक क म ह? 12 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 12

13 SSC CGL 11-august Kelvin क खल वन 2.Joule ज र 3.Celsius स खल समस 4.Fahrenheit प य नह इट Correct Answer: Kelvin क खल वन Q38. Electric Motor converts energy to mechanical energy ववद य त भ टय ककस ऊज क म वत रक ऊज भ फदरत ह? SSC CGL 11-august sound ध वलन 2.mechanical म वत रक 3.chemical यस मलनक 4.electrical ववद य त Correct Answer: electrical Q39. Optical fibre works on which of the following principle of light? प रक श म त त लनम नलरख त भ स प रक श क ककस लसद ध त ऩय क म कयत ह? 1.Reflection ऩय वत न 2.Refraction अऩवत न 3.Diffraction वववत न 4.Total internal reflection ऩ ण आ तरयक ऩय वत न Correct Answer: Total internal reflection ऩ ण आ तरयक ऩय वत न SSC CGL 11-august-2017 An optical fiber is a cylindrical dielectric waveguide (nonconducting waveguide) that transmits light along its axis, by the process of total internal reflection. The fiber consists of a core surrounded by a cladding layer, both of which are made of dielectric materials. Q40. Who invented Pentium Chip? ऩ कटमभ ल ऩ क आववष क य ककसन ककम? SSC CGL 11-august C. Kumar Patel स क भ य ऩट र 2.Tom Gunter ट भ ग टय 13 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 13

14 3.Vince Emery वव स एभ य 4.Vinod Dham ववन द ध भ Correct Answer: Vinod Dham ववन द ध भ Share to Support : WhatsAppFacebookTelegramTwitterGoogle+Share19 Q41. Which among the following determines the pitch of a sound? लनम नलरख त भ स ध वलन स वयभ न (वऩ ) क क न लनध रयत कयत ह? 1.Amplitude आम भ 2.Frequency आव वत त 3.Loudness प रफरत 4.Wavelength तय ग द ध म Correct Answer: Frequency आव वत त SSC CGL 11-august-2017 Pitch is a close proxy for frequency, it is almost entirely determined by how quickly the sound wave is making the air vibrate and has almost nothing to do with the intensity, or amplitude, of the wave. High pitch means very rapid oscillation, and low pitch corresponds to slower oscillation. Q42. Which phenomena shows the particle nature of light? क न स घटन प रक श क कण प रक लत क कद त ह? 1.Diffraction वववत न 2.Interference यतमलतकयण 3.Photo electric effect प रक श ववद य त प रब व 4.Polarisation ध र व कयण Correct Answer: Photoelectric effect प रक श ववद य त प रब व SSC CGL 11-august-2017 Einstein asserted that light is a particle containing energy corresponding to their wavelength. The photoelectric effect is a phenomenon where irradiating a blue light on metal emits electrons from it. However, red light does not cause electron emission from metal no matter how long or how intense the light is applied. Q43. Who pioneered diagnostic ultrasound? न द लनक (ड मग न खस टक) अल स उ ड क ज ककसन क? SSC CGL 11-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 14

15 1.Alexan der Fleming एर ग ज डय फ र लभ ग 2.Ian Donald ईम न ड न ल ड 3.A. Laveran ए र व य न 4.Robert Koch य फट क Correct Answer: Ian Donald ईम न ड न ल ड Q44. What is the SI unit of intensity of sound? ध वलन क त व रत क SI भ त रक क म ह? 1.Decible ड स फर 2.Newton न म टन 3.Heartz हटज 4.Tesla ट स र Correct Answer: Decible ड स फर SSC CGL 11-august-2017 The hertz (symbol: Hz) is the derived unit of frequency in (SI) and is defined as one cycle per second The tesla (symbol T) is the SI derived unit used to measure magnetic fields Q45. Which colour is formed when Blue and Green are mixed? न र तथ हय य ग क लभश रण स क न स य ग प र प त ह त ह? SSC CGL 12-august Cyan लसम न 2.Brown ब य 3.Black क र 4.Violet फ गन Correct Answer: Cyan Q46. What was invented by J. B. Dunlop? ज फ डनरऩ न ककसक अववष क य ककम थ? SSC CGL 12-august Airplane हव ई जह ज 2.Car क य 3.Rubber Tyre यफय ट मय 4.Rubber Boot यफय क ज त 15 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 15

16 Correct Answer: Car क य Q47. When a ball is thrown vertically upwards, which of the following quantities remains constant during its motion? एक ग द क र फ ऩ व क स ऊऩय प क ज न ऩय उसक र क द य न लनम नलरख त भ स क न-स ब लतक भ त र अ य यहत ह? 1.Energy ऊज 2.Displacement ववस थ ऩन SSC CGL 12-august Velocity गलत 4.Acceleration त वयण Correct Answer: Energy Q48. What is the SI unit of heat energy? ऊष भ क SI भ त रक क म ह? 1.Joule ज र SSC CGL 12-august Newton न म टन 3.Calorie क र य 4.Kelvin क खल वन Correct Answer: Joule ज र Energy is defined via work, the SI unit for energy is the same as the unit of work the joule (J), Q49. What is the value of the Least Distance of Distinct vision (in cm) for a normal human being? एक स भ न म भन ष म क लरए स ऩष द वष क न म नतभ द य स ट भ टय भ ककतन ह त ह? [SSC CGL 12- SSC CGL 8-august Correct Answer: 25 For a normal eye the least distance of distinct vision is about 25 centimetres. However, it varies with age of the person. For example, for infants it is only 5 to 8 cm.elderly person, least distance of distinct vision is 50 cm 16 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 16

17 Q50. For which of the following game, players must have the knowledge of Pascal s law? लनम नलरख त भ स ककस र भ ख र कड म क ऩ स ऩ स कर क लनमभ क न ह न आवश मक ह? 1.Climbing ढ ई 2.Paragliding ऩ य ग र इकड ग 3.Rafting य खफ ट ग 4.Scuba diving स क फ ड इवव ग Correct Answer: Scuba diving स क फ ड इवव ग SSC CGL 12-august-2017 Pascal s rule is used to design water towers, but scuba divers must also understand this principle. At a depth of 10 meters under water, pressure is twice the atmospheric pressure at sea surface, and increases by about 100 kpa (about 1 atm) for each increase of 10 m depth. Q51. Who invented the Centigrade scale? स ट ग र ट भ ऩ स क र क आववष क यक क न ह? SSC CGL 12-august Anders Celsius ऐ डस स खल समस 2.Daniel Gabriel Fahrenheit ड लनमर ग व मर फ य नह इट 3.William Thomson ववलरमन थ भसन 4.Wright Brothers य इट दस Correct Answer: Anders Celsius Q52. On which principle does the hydraulic lift works? द रव लरत लरफ ट ककस लसद ध त ऩय क म कयत ह? 1.Newton s law न म टन क लसद ध त 2.Pascal s law ऩ स कर क लसद ध त 3.Archimedes s law आक भड ज क लसद ध त 4.Joule s law ज र क लसद ध त Correct Answer: Pascal s law ऩ स कर क लसद ध त SSC CGL 16-august-2017 According to Pascal s Principle pressure in a liquid is independent of direction. Pressure is force divided by area, so force exerted by a liquid is equal to the pressure times the area. A hydraulic lift has a small piston in a cylinder. If you exert a force on the piston, it will create a pressure in the fluid. The lift also has a second, large area cylinder and piston. The fluid creates a pressure in this cylinder that exerts a much larger force on the piston because of its larger area. 17 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 17

18 Therefore the lift has a mechanical advantage. Of course, energy is still conserved, so the small piston must move much farther than the large piston. Q53. At what temperature (in degree celsius), the numerical values on Celsius and Fahrenheit scales become equal? ककस त ऩभ न (कडग र स खल समस) ऩय स खल समस तथ प य नह इट स क र ऩय अ क म भ न सभ न ह ज त ह? Correct Answer: 40 SSC CGL 16-august-2017 Q54. Which of the following causes fly ash? लनम नलरख त भ स क न-स उड न य क क यण ह? SSC CGL 16-august Hydroelectric Power Station जर ववद य त ऊज क द र 2.Coal Combustion Power Plant क मर दहन ऊज क द र 3.Nuclear Power Plant न लबक म ऊज स म त र 4.Tidal Power Plant ज व य म ऊज स म त र Correct Answer: Coal Combustion Power Plant क मर दहन ऊज क द र Q55. Who developed the theory of relativity? स ऩ त क लसद ध त ककसन ववकलसत ककम थ? SSC CGL 16-august Issac Newton आइज़क न म टन 2.Charles Darwin ल स ड वव न 3.Marie Curie भ य क म य 4.Albert Einstein अल फट आइ स ट न Correct Answer: Albert Einstein अल फट आइ स ट न Q56. What is the SI unit of Power? ऊज क SI भ त रक क म ह? SSC CGL 16-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 18

19 1.Boyle फ मर 2.Watt व ट 3.Newton न म टन 4.Pascal ऩ सकर Correct Answer: Watt व ट Q57. Which of the following pair is INCORRECT? I. Parsec Distance II. Barrel Liquid III. Light year Time लनम नलरख त भ स क न स म ग भ गरत ह I. ऩ यस क द य II. फ यर तयर III. प रक श वष सभम 1.Only III क वर III 2.Only I and III क वर I तथ III 3.Only II क वर II 4.All are correct सब सह ह Correct Answer: Only III क वर III Parsec :- Astronomical units: au; ly Barrel :-159 liters Light year : ^15 m SSC CGL 16-august-2017 Q58. Supercooling is cooling of liquid. अलत श तरन (स ऩय क लर ग) ककस द रयतम क श तर कयन ह त ह SSC CGL 16-august below melting point गरन क स न 2.below freezing point कहभ क स न 3.at melting point गरन क ऩय 4.above melting point गरन क स ऊऩय Correct Answer: below freezing point कहभ क स न 19 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 19

20 Supercooling, also known as undercooling, is the process of lowering the temperature of a liquid or a gas below its freezing point without it becoming a solid Q59. When light passes from one medium to another, this phenomenon of change in its direction is called. मह प रक श क एक भ ध मभ स द सय भ ध मभ भ ग जयन ऩय उसक कदश भ ह न व र ऩरयवत न क घटन क म कहर त ह? 1.Refraction अऩवत न 2.Diffraction वववत न 3.Propagation स यण 4.No option is correct क ई ववकल ऩ सह नह ह Correct Answer: Refraction अऩवत न SSC CGL 16-august-2017 Q60. Who invented radar? यड य क आववष क य ककसन ककम थ? SSC CGL 16-august Fred Morrison फ र ड भ रयसन 2.A. H. Taylor and Leo C. Young ए ए ट रय तथ लरम स म ग 3.Van Tassel व न ट लसर 4.W. K. Roentgen डब ल म क य टजन Correct Answer: A. H. Taylor and Leo C. Young ए ए ट रय तथ लरम स म ग Q61. The sliding friction is than the static friction. सऩ घष ण, खस थलत घष ण स ह त ह SSC CGL 17-august double द गन 2.same एक क य 3.greater अलधक 4.smaller कभ Correct Answer: smaller कभ 20 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 20

21 The sliding friction is less than static friction because of the interlocking of irregularities in the two surfaces. When the object starts sliding the contact points on its surface, do not get enough time to lock into the contact points on the floor. So the sliding friction is slightly less than the static friction. Q62. Kelvin (K) is the unit of measurement of. क खल वन क म भ ऩन क इक ई ह? SSC CGL 17-august Density घनत व 2.Pressure द फ 3.Mass द रयतमभ न 4.Temperature त ऩभ न Correct Answer: Temperature त ऩभ न Q63. In science a push or pull of an object is called. वव न भ ककस वस त ऩय अब कष ण म अऩकष ण क क म कहत ह? SSC CGL 17-august Pick नन 2.Lift उठ न 3.Force फर 4.Shut फ द Correct Answer: Force फर Q64. Who discovered the colour photography? य ग न प ट ग र प क ज ककसन क? SSC CGL 17-august Robert Noyce य फट न मस 2.Enrico Fermi एनरयक पभ 3.John Logie Baird ज न र ग फ मड 4.James Clerk Maxwell ज म स क रक भ क सव र Correct Answer: James Clerk Maxwell Q65. In a qualitative way, the tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called. 21 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 21

22 ग ण त भक र ऩ भ ककस वस त क ववय भ अवस थ भ यहन म सभ न व ग स गलतश र यहन क प रव वत त क क म कहत ह? SSC CGL 18-august force फर 2.acceleration त वयण 3.friction घष ण 4.inertia जड त व Correct Answer: inertia Q66. The time taken by a pendulum to complete one oscillation is called its? सयर र रक एक द रन ऩ य कयन भ खजतन सभम र त ह उस सयर र रक क क म कहत ह? SSC CGL 18-august Maximum speed अलधकतभ र 2.Average speed औसत र 3.Time period आवत क र 4.Time interval सभम अ तय र Correct Answer: Time period आवत क र Q67.Who invented the electric tram? इर खक क भ क आववष क य ककसन ककम? SSC CGL 18-august James Cook ज म स क क 2.William Harvey ववलरमभ ह व 3.Fyodor Pirotsky फ म द य वऩय त स क 4.Robert Boyles य फट फ मल स Correct Answer: Fyodor Pirotsky Q68. If the speed of an object moving along a straight line is constant, its motion is said to be. मकद ककस सयर य क अन कदश गलत कयन व र वस त क र खस थय यहत ह त उस वस त क र क क म कह ज त ह? 1.Uniform एक सभ न SSC CGL 18-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 22

23 2.Periodic आवत 3.Circular व त त क य 4.Non -uniform असभ न Correct Answer: Uniform एक सभ न A body is said to be in uniform motion, if it travels equal distances in equal intervals of time. A body is said to have non-uniform motion, if it travels unequal distances in equal intervals of time. Q69. The strength of a force is usually expressed by its. फर क प रफरत प र म: इसक स भ ऩ ज त ह SSC CGL 18-august Motion गलत 2.Direction कदश 3.Interaction अन म न मक म 4.Magnitude ऩरयभ ण Correct Answer: Magnitude ऩरयभ ण Q70. The side mirrors of vehicles are of which type of mirrors? व हन क ऩ श व दऩ ण (स इड लभयय) भ ककस प रक य क दऩ ण क उऩम ग ककम ज त ह? [SSC CGL 1.Convex उत तर 2.Concave अवतर 3.Plane सभतर 4.Inverted उल ट Correct Answer: Convex उत तर SSC CGL 18-august-2017 image is smaller, more image can fit onto the mirror, so a convex mirror provides for a larger field of view than a plane mirror. Q71. If the mass of an object is 60 kgs, what will be its weight on the moon? (N=Newton) मकद ककस वस त क द रयतमभ न 60 ककर ग र भ ह त द रभ ऩय उसक वजन क म ह ग?(N=न म टन) 1.60N 2.600N 3.100N 4.10N SSC CGL 18-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 23

24 Correct Answer: 100N Q72. In the formula average velocity = (u + v) /2, u is the. औसत व ग क स त र = (u + v) /2, भ u ह SSC CGL 19-august Final velocity अ लतभ व ग 2.Initial displacement प र य लबक ववस थ ऩन 3.Initial velocity प र य लबक व ग 4.Final displacement अ लतभ ववस थ ऩन Correct Answer: Initial velocity प र य लबक व ग Q73.If the speed of an object moving along a straight line keeps changing, its motion is said to be. मकद ककस सयर य क अन कदश गलत कयन व र वस त क र ऩरयवलत त ह त यहत ह त इस वस त क र क क म कह ज त ह? 1.Uniform एक सभ न 2.Periodic आवत 3.Circular व त त क य 4.Non-uniform आसभ न Correct Answer: Non-uniform SSC CGL 19-august-2017 Q74. The substances which reduce friction are called. ऐस ऩद थ ज घष ण कभ कयत ह क म कहर त ह? SSC CGL 19-august irregularities अलनमलभतत ए 2.lubricants स न हक 3.adhesives आस जक 4.viscous ल ऩल ऩ Correct Answer: lubricants स न हक Q75. What is the unit of calorific value? ऊष भ म भ न क भ त रक द व य प रदलश त ककम ज त ह? 24 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 24

25 SSC CGL 19-august kN/kg 2.kJ/kg 3.kW/sec 4.kCal/sec Correct Answer: kj/kg The amount of heat released (energy produced) by the complete combustion of a material or fuel. Measured in units of energy per amount of material, e.g. kj/kg Q76. Who invented Space Pen? स ऩ स ऩ न क आववष क य ककसन ककम? 1.Paul C. Fisher ऩ र स कपशय SSC CGL 19-august Rudolf Dies el र ड ल प ड जर 3.Wright Bro thers य इट फ ध 4.Alexa nder Fleming अर क ज डय फ र लभ ग Correct Answer: Paul C. Fisher Q77. If the force applied on the object is in the direction opposite to the direction of motion, the speed of the object. मकद ककस वस त ऩय रग ए गए फर क कदश वस त क गलत क ववऩय त कदश भ ह त ह त वस त क गलत 1.increases फढ त ह 2.stops र क ज त ह 3.decreases कभ ह ज त ह 4.no effect क ई प रब व नह Correct Answer: decreases कभ ह ज त ह SSC CGL 19-august-2017 Q78. The SI unit of acceleration is. त वयण क SI भ त रक क म ह? 1.meters per seconds squared भ टय प रलत वग स क ड SSC CGL 19-august meters per second भ टय प रलत स क ड 3.seconds per meter स क ड प रलत भ टय 25 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 25

26 4.seconds per meter squared स क ड प रलत वग भ टय Correct Answer: meters per seconds squared भ टय प रलत वग स क ड Q79. Who discovered Photon? प र ट न क ज ककसन क? SSC CGL 19-august George Crum ज ज भ 2.Albert Einstein अल फट आइ स ट न 3.Henry Cavendish ह नय क व कडश 4.Humphry Davy हम फ र ड व Correct Answer: Albert Einstein अल फट आइ स ट न Q80. Contact force is another name for. स ऩक फर क फर ब कह ज त ह 1.Friction घष ण 2.Magnetic force फक म फर 3.Electrostatic force खस थय ववद य त फर 4.Muscular force ऩ श म फर Correct Answer: Muscular force ऩ श म फर A contact force is any force that requires contact to occur. Ex:- Applied Force. Gravitational Force. Normal Force. Frictional Force Q81.The force of friction between two surfaces will increase if: द सतह क फ रगन व र घष ण फर फढ त ह मकद: SSC CGL 20-august A layer of lubricant is kept between the two surfaces द ऩ ष क फ स न हक क ऩयत रग ई ज ए SSC CGL 20-august the two surfaces are pressed harder द ऩ ष क फरऩ व क दफ म ज ए 3.air gap is created between the two surfaces द ऩ ष क फ हव क अ तय र य ज ए 4.irregularities on both the surfaces are removed 26 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 26

27 द न सतह क अलनमलभतत क हट कदम ज ए Correct Answer: the two surfaces are pressed harder द ऩ ष क फरऩ व क दफ म ज ए Q82. The property of metal by which it can be drawn into wires is called. ध त ओ क वह ग ण खजसस उन ह कय त य भ ऩरयवलत त ककम ज सकत ह क म कहर त ह? 1.Maleability आघ तवध न मत 2.viscosity श म नत 3.ductility तन मत 4.tensile strength तनन-स भर थम Correct Answer: ductility तन मत SSC CGL 20-august-2017 Malleability is a substance s ability to deform under pressure. Malleable materials can be flattened into metal leaf. The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. For liquids, it corresponds to the informal concept of thickness ; for example, honey has a much higher viscosity than water. The tensile strength of a material is the maximum amount of tensile stress that it can take before failure, for example breaking. Q83. An image formed by a plane mirror, that cannot be obtained on a screen is called? सभतर दऩ ण द व य फनन व र खजस प रलतवफ फ क ऩद ऩय प र प त नह ककम ज सकत ह उस क म कहत ह? SSC CGL 20-august Virtual image आब स प रलतवफ फ 2.Real image व स तववक प रलतवफ फ 3.Inverted image उल ट प रलतवफ फ 4.Erect image स ध प रलतवफ फ Correct Answer: Virtual image आब स प रलतवफ फ Q84. The force exerted by a magnet is an example of. फक द व य रग म गम फर इस फर क एक उद हयण ह SSC CGL 20-august Non-contact force अस ऩक फर 2.Muscular force ऩ श म फर 27 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 27

28 3.Contact force स ऩक फर 4.Electrostatic force खस थय ववद य त फर Correct Answer: Non-contact force अस ऩक फर Q85. According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the of an object. गलत क द सय लनमभ क अन स य ककस कदए ह ए फर क लरए त वयण वस त क क यतम त भ न ऩ त ह त ह 1.density घनत व 2.volume आमतन 3.force फर 4.mass द रयतमभ न Correct Answer: mass SSC CGL 20-august-2017 Q86. The coil wire in the electric room heater or electric cooking heater is called. कभय क गभ य न म न ऩक न भ उऩम ग ह न व र ववद य त त ऩक भ त य क ज क डर ह त ह उस क म कहत ह? 1.Circuit ऩरयऩथ 2.Element अवमव 3.Filament त त 4.Cells स र Correct Answer: Element अवमव SSC CGL 20-august-2017 Most modern electric heating devices use nichrome wire as the active element; the heating element, depicted on the right, uses nichrome wire supported by ceramic insulators. Q87. Energy in the form of heat is wasted when a machine is operated. This heat is generated due to. जफ हभ ककस भश न क उऩम ग कयत ह त घष ण स ऊष भ नष ह ज त ह मह उसभ ककसक क यण उत ऩन न ह त ह? 1.burning जरन SSC CGL 21-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 28

29 2.friction घष ण 3.combustion दहन 4.lubrication उऩस न हन Correct Answer: friction घष ण Q88. The incident ray, the at the point of incidence and the reflected ray all lie in the same plane. आऩलतत ककयण आऩतन वफ द ऩय औय ऩय वलत त ककयण सब एक तर भ ह त ह 1.surface ऩ ष 2.tangent स ऩश य 3.normal अलबर फ 4.angle of reflection ऩय वत न क ण Correct Answer: normal अलबर फ SSC CGL 21-august-2017 The laws of reflection states that :- (1)The incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. (2)The angle of reflection is equal to the angle of incidence Q89. Who invented Velcro? व ल क आववष क य ककसन ककम? SSC CGL 21-august Thomas Edison थ भस एकडसन 2.William Harvey ववलरमभ ह व 3.George de Mestral ज ज द लभस र 4.Robert Boyles य फट फ मल स Correct Answer: George de Mestral ज ज द लभस र Q90. During uniform motion of an object along a straight line, the remains constant with time. ककस वस त क एक सभ न सयर य म गलत क द य न सभम क स थ -लनमत यहत ह 1.Time सभम 2.Velocity व ग SSC CGL 21-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 29

30 3.Acceleration त वयण 4.Distance द य Correct Answer: Velocity व ग Motion of an object in which the object travels in a straight line and its velocity remains constant along that line as it covers equal distances in equal intervals of time is called uniform motion. Q91. The impression of an image persists on the retina for about of a second. य कटन ऩय फन प रलतवफ फ क प रब व रगबग ककतन स क ड तक फन यहत ह 1.1/10 व 2.1/8 व 3.1/16 व 4.1/5 व SSC CGL 21-august-2017 Correct Answer: 1/16th The impression of an image does not vanish immediately from the retina. It persists there for about 1/16th of a second. So, if still images of a moving object are flashed on the eye at a rate faster than 16 per second, then the eye perceives this object as moving. This is the principle used in cinematography by motion pictures. Q92. An image formed by a concave mirror on a screen is called? अवतर दऩ ण द व य ऩद ऩय फनन व र प रलतवफ फ क क म कह ज त ह? 1.Virtual image आब स प रलतवफ फ 2.Real image व स तववक प रलतवफ फ 3.Inverted image उल ट प रलतवफ फ 4.Erect image स ध प रलतवफ फ SSC CGL 21-august-2017 Correct Answer: No Correct Answer ( Benefit to all ) Plane mirrors and convex mirrors only produce virtual images. Only a concave mirror is capable of producing a real image and this only occurs if the object is located a distance greater than a focal length from the mirror s surface. Concave mirrors can produce both real and virtual images; they can be upright (if virtual) or inverted (if real); they can be behind the mirror (if virtual) or in front of the mirror (if real) Q93. The distance-time graph for the motion of an object moving with a constant speed is a. 30 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 30

31 लनमत र स गलत कयन व र वस त क द य सभम ग र प एक ह त ह SSC CGL 21-august Dot वफ द 2.Circle व त त 3.Straight Line सयर य 4.Curve व Correct Answer: Straight Line सयर य Q94. Who invented the waterproof raincoat? जरय धक य नक ट क आववष क य ककसन ककम? SSC CGL 21-august Robert Hooke य फट ह क 2.Cai Lun क र न 3.Charles Macintosh ल स भ कक ट श 4.William Harvey ववलरमभ ह व Correct Answer: Charles Macintosh ल स भ कक ट श Q95. If an object moves in a circular path with uniform, its motion is called uniform circular motion. अगय क ई वस त व त त म ऩथ ऩय एक सभ न स रत ह त उसक गलत क एक सभ न व त त म गलत कह ज त ह 1.speed र 2.Time सभम 3.Velocity व ग 4.Acceleration त वयण SSC CGL 22-august-2017 Correct Answer: speed Uniform circular motion can be described as the motion of an object in a circle at a constant speed. Examples of circular motion include: an artificial satellite orbiting the Earth at a constant height, a stone which is tied to a rope Q96. The reflection formed by the plane mirror is. सभतर दऩ ण द व य फनन व र प रलतवफ फ क स ह त ह? 31 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 31

32 SSC CGL 22-august vertical inversion र फवत ऩरयवत न 2.a real image व स तववक प रलतवफ फ 3.lateral inversion ऩ श व ऩरयवत न 4.an enlarged image फड प रलतवफ फ Correct Answer: -lateral inversion ऩ श व ऩरयवत न Q97. Convex and concave mirrors are examples of? उत तर औय अवतर दऩ ण ककसक उद हयण ह? SSC CGL 22-august Plane mirrors सभतर दऩ ण 2.Spherical mirrors ग र म दऩ ण 3.Inverted mirror उल ट दऩ ण 4.Erect mirror स ध दऩ ण Correct Answer: Spherical mirrors ग र म दऩ ण Q98. The frictional force exerted by fluids is also called. तयर द व य रग ए गए घष ण फर क क म कहत ह? SSC CGL 22-august drag कष ण 2.buoyancy उत र वकत 3.upthrust उत ऩ 4.convection स वहन Correct Answer: drag कष ण Q99. Who discovered electricity and invented the lightning rod and bifocals? ववद य त क ज ककसन क औय तकड त रक औय कद वप क स क आववष क य ककसन ककम? SSC CGL 22-august Kirkpatrick Macmillan क क ऩ क क भ कलभरन 2.Benjamin Franklin फ ज लभन फ र कलरन 3.William Henry Fox Talbot ववलरमभ ह नय प क स अल फट 4.Sir Alexander Fleming सय एर ग ज डय फ र लभ ग 32 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 32

33 Correct Answer: Benjamin Franklin फ ज लभन फ र कलरन Q100. The property of metals by which they can be beaten into thin sheets is called. ध त ओ क ग ण खजसक क यण उन ह ऩ टकय श ट भ ऩरयवलत त ककम ज सकत ह क म कहर त ह? 1.ductility तन मत 2.malleability आघ तवध न मत 3.viscosity श म नत 4.tensile strength तनन-स भर थम Correct Answer: malleability आघ तवध न मत SSC CGL 22-august-2017 Malleability is a substance s ability to deform under pressure. Malleable materials can be flattened into metal leaf. The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. For liquids, it corresponds to the informal concept of thickness ; for example, honey has a much higher viscosity than water. The tensile strength of a material is the maximum amount of tensile stress that it can take before failure, for example breaking. Ductility is when a solid material stretches under tensile stress. If ductile, a material may be stretched into a wire. Q101. If the force applied on the object is in the direction of its motion, the speed of the object. मकद ककस वस त ऩय रग म गम फर वस त क गलत क कदश भ ह त वस त क गलत SSC CGL 1.increases फढ त ह 2.stops र क ज त ह 3.decreases कभ ह त ह 4.no effect क ई प रब व नह Correct Answer: increases फढ त ह SSC CGL 22-august-2017 Q102. Friction is caused by the on the two surfaces in contact. घष ण स ऩक भ आन व र 2 ऩ ष क क क यण ह त ह SSC CGL 23-august irregularities अलनमलभतत ओ 33 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 33

34 2.smoothness ल कन ई 3.densities घनत व 4.gaps अ तय र Correct Answer: irregularities अलनमलभतत ओ Q103. The motion of a freely falling body is an example of motion. स वत त र र ऩ स लगय यह एक वस त क गलत ककस गलत क उद हयण ह? 1.uniformly accelerated एक सभ न त वरयत 2.non-uniformly accelerated असभ न त वरयत 3.constant velocity खस थय व ग 4.constant speed खस थय र Correct Answer: uniformly accelerated एक सभ न त वरयत SSC CGL 23-august-2017 A freely falling object is an object that moves under the influence of gravity only. Neglecting air resistance, all objects in free fall in the earth s gravitational field have a constant acceleration that is directed towards the earth s center, or perpendicular to the earth s surface, and of magnitude. g = 9.8 m/s^2 Q104. Who invented the hot air balloon? गभ हव क ग ब फ य क अववष क य ककसन ककम? SSC CGL 23-august Montgo lfier brothers भ टग खल पएय ब इम 2.Wright brothers य इट ब इम 3.Lisitsyn brothers लरस टस ब इम 4.Walton brothers व ल टन ब इम Correct Answer: Montgolfier brothers भ टग खल पएय ब इम Q105. A ball rolling along the ground gradually slows down and finally comes to rest is due to. क क यण पश ऩय र ढ कन व र ग द ध य ध य ध भ ह ज त ह औय अ लतभ भ र क ज त ह 1.Friction घष ण 2.Magnetic force फक म फर SSC CGL 23-august सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 34

35 3.Electrostatic force खस थय ववद य त फर 4.Muscular force ऩ श म फर Correct Answer: Friction घष ण Q106. The angle between the and the incident ray is called the angle of incidence. औय आऩलतत ककयण क फ क क ण क आऩतन क ण कहत ह SSC CGL 23-august surface प रश ठ 2.normal अलबर फ 3.tangent स ऩश य 4.reflected ray ऩय वलत त ककयण Correct Answer: normal अलबर फ Q107. Who invented the thermos flask? थयभस फ र स क क आववष क य ककसन ककम? SSC CGL 23-august Ray Tomlinson य ट भलर सन 2.Tim Berners-Lee कटभ फन स र 3.William Cullen ववलरमभ क र न 4.James Dewar ज म स द व य Correct Answer: James Dewar ज म स द व य Q108. For an object, the state of rest is considered to be the state of speed. ककस वस त क ववय भ अवस थ क र क अवस थ भ न ज त ह SSC CGL 23-august increasing फढ त ह ई 2.decreasing कभ ह त ह ई 3.inverse ववऩय त 4.zero श न म Correct Answer: zero Q109. The laws which govern the motion of planets are called. ग रह क गलत क फत न व र लनमभ क क म कह ज त ह? 35 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 35

36 1.Newton s Laws न म टन क लनमभ 2.Kepler s Laws क रय क लनमभ 3.Avogadro s Laws एव ग ड र क लनमभ 4.De Morgan s Laws ड भ ग न क लनमभ Correct Answer: Kepler s Laws क रय क लनमभ SSC CGL 23-august-2017 Avogadro s law states that, equal volumes of all gases, at the same temperature and pressure, have the same number of molecules De Morgan s law: The complement of the union of two sets is equal to the intersection of their complements and the complement of the intersection of two sets is equal to the union of their complements. Q110. Gravitational force is maximum at which of the following place? लनम नलरख त भ स ककस स थ न ऩय ग र त व कष ण फर सफस अलधक ह? SSC CGL 8-august At equator ब भध म य ऩय 2.At tropic of cancer कक य ऩय 3.At tropic of Capricorn भकय य ऩय 4.At poles ध र व य ऩय Correct Answer: At poles ध र व य ऩय 36 सभ प रत य त पर ओ क Handwritten and Typewritten Notes क Free म PDF Download करन क तऱए हम र व बस इट पर visit कर Page 36

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