GGSIPU physics If M is the mass of the earth and R its rasius,the ratio of the gravitational acceleration and the gravitational constant is :

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1 GGSIPU physis If M is the mass of the earth and R its rasius,the ratio of the gravitational aeleration and the gravitational onstant is : a MR 2 d 2. A student unale to answer a question on Newton s laws of motion attempts to pull himself up y tugging on the his hair.he will not sueed : a as the fore exerted is small the fritional fore while gripping,is small living eings Newton s law of inertia is not appliale to 3. From the adjaent figure,the orret oservation is : d as the fore applied is internal to the system W a t e r W a t e r A B a d the pressure on the uttom of tank A is greater than at the ottom of B the pressure on the uttom of the tank A is smaller than at the uttom of B the pressure depends on the shape of the ontainer the pressure on the uttom of A and B is the same 4. Whih one of the following is not a unit of Young s modules? a NM -1 N M -2 dyne m -2 d mega pasal

2 5. A piee of lue glass heated to a high temperature and a piee of red grass at room temperature,are taken inside a dimly lit room,then : as usual lue red piee a the lue piee will look lue and red will look red looks righter red and lue looks ordinary lue shines like righter red ompared to the d oth the piee wil l look equally red 6. Three long,straight parallel wires,arrying urrent,are arranged as shown in figure.the fore D C G experiened y a 25 m length of wire C is : 3 m 3 m a N 2.5 x A 10 A 20 A zero d 1.5 x 10 3 N 7. A 5.0 amp urrent is setup in an external iruit y a 6.0 volt storage attery for 6.0 minutes.the hemial energy of the attery is redued y : a 1.08 x 10 4 J 1.8 x 10 4 J 1.08 x 10 4 J d 1.08 x 10 4 J 8. The urrent in a simple series iruit is 5.0 A.When an additional resistane of 2.0 W is inseted,the urrent drops to 4.0 A.The original resistane of the iruit,in ohms was : a d In the iruit given E = 6.0 V,R 1 = 100W, R 4 =75W. The equivalent resistane of the iruit, in ohms is : i R1 R4 E R2 R3

3 a d none of these 10. Two resistanes are onneted in two gaps of a metre ridge.the alane point is 20 m from the zero end.a resistane of 15W is onneted in series with the smaller of the two.the null point shifts to 40 m.the value of the smaller resistane in ohms is : a d If the potential different aross the internal resistane r 1 is equal to the emf E of the attery,then : E r 1 E r 2 R a R = r 1 + r 2 R = R = r 1 - r 2 d R = 12. By using only two resistane oils-singly,in series or in parallel one should e ale to otain resistans of 3,4,12 and 16 W.The separate resistane of the oil are : a 3 and 4 4 and and 16 d 16 and The eletrons in the eam of a television tue move horizontally from south to north.the vertial omponent of the earth s magneti field points down.the eletron is defleted towards : a west no defletion east d north to south

4 14. A tangent galvanometer has a redution fator of 1 A and it is plaed with the plane of its oil perpendiular to the magneti meridian.the defletion produed when a urrent of 1 A is passed through it is : a d none of these 15. In this given iruit,the voltmeter reords 5 V.The resistane of the voltmeter in ohms is : V V a d The wavelength of the radiation emitted y a ody depends upon : a the nature of the surfae the area of the surfae the temperature of the surfae d all the aove fators 17. whih mirror is to e used to otain a parallel eam of light from a small lamp? a plane mirror Convex mirror Conave mirror d Any one of the aove

5 18. An ideal monoatomi gas is taken around the yle ABCDA as shown in the PV diagram.the work P done during the yle is given y 2 P,: V 2P,2V B C A D P,V P,2V V a PV PV 2 PV d 4 PV 19. Whih of the following is a wrong statement? alled the refrative power of lens a D =, where f I the foal length and D is metres not depend on the system of unit used to measure f negative for divergent lens Power is expressed in dioptre when f is in Power is expressed in dioptere and does d D is positive for onvergent lens and 20. Identify the wrong desription of the elow figures F

6 a d 1 represents far-sightedness 2 orretion for short sightedness 3 represents far-sightedness 4 orretion for-sightedness 21. An eletri field of 1500 V/m and a magneti field of 0.40 W/m 2 at on moving eletron.the minimum uniform speed along a straight line the eletron ould have is : a 1.6 x m/s 6 x m/s 3.75 x 10 3 m/s d 3.75 x 10 2 m / s 22. In an ammeter 10% of main urrent is passing through the galvanometer.if the resistane of the galvanometer is C,then the shunt resistane,in ohms is : a 9G 90 G d 23. Among the following properties desriing diamagnism identify the property that is wrongly stated : permanent magneti moment of eletromagneti indution a diamagneti material do not have diamagnetism is explained in terms positive suseptiility diamagneti materials have a small eletrons neutralize eah other d the magneti moment of individual 24. The indution oil works on the priniple of : a self -indution mutual indution Ampere s rule d Fleming s right hand rule

7 25. The square root of the produt of indutane and apaitane has the dimension of? a length time mass d no dimension 26. When a ody falls in air,the resistane of air depends to a great extant on the shape of the ody.3 different shapes are given.identify the omination of air resistanes whih truly represents the physial situation. R R R W W W Cigar shaped 1 dis 2. Ball 3. The ross -setional areas are the same. a 1 < 2 < 3 2 <3 < 1 3 < 2 < 1 d 3 <1 < The adjaent figure is the part of a horizontally strethed net.setion AB is strethed with a fore of 10 N.The tensions in the setions BC and BF are : E D C G B F A

8 a d 10 N, 11 N 10 N, 6 N 10 N, 10 N Cannot e alulated due to insuffiient data 28. Out of the following four dimensional quantities, whih one qualifies to e alled a dimensional onstant? a Aeleration due to gravity Surfae tension of water mass Weight of a standard kilogram d The veloity of light in vaum 29. The relationship etween the fore F and position x of a ody is as shown in figure.the work done in displaing the ody from x = 1 m to x = 5 m will e : a 30 J 15 J 25 J d 2 0 J 30. From the top of a water of two stones,whose masses are in the ratio 1 : 2 are thrown on straight up with an initial speed u and the seond straight down with the same speed u.then negleting air resistane : F N X m a The havier stone hits the ground with a higher speed The lighter stone hits the ground with a higher speed Both the stones have the same speed when they hit the ground

9 d The speed annot e determined with the given data 31. Infrared radiation was disovered in 1800 y : a William Wollaston William Hershel Wilhelm Roengen d Thomas Young 32. A partile on the through of a wave at any instant will ome to the mean position after a time T = time period : a T/2 T/4 T d 2T 33. The dis of a siren ontaining 60holes rotates at a onstant speed of 360 rpm.the emitted sound is in unison with a tuning fork of frequeny : a 10 H z 216 H z 360 H z d 60 H z 34. The ratio of veloity of sound in hydrogen and oxygen at STP is : a 16 : 1 8 : 1 4 : 1 d 2 : In an experiment with sonometer a turning fork of frequeny 256 H z resonates with a length of 25 m and another turning fork resonates with a length of 16 m.tension of the string remaining onstant the frequeny of the seond turning fork is : a H z 320 H z 400 H z d H z 36. The apparent frequeny of note is 200 H z,when a listener is moving with a veloity of 40 ms -1 towards a stationary soure.when he moves away from the same soure with the same speed,the apparent frequeny of the same note is 160 H z.the veloity of sound in air in m/s is : a d 320

10 37. The wave theory of light,in its original form,was first posulated y : a Issa Newton Christian Huygens Thomas Young d Augustin Jean Fresnel 38. If a liquid does not wet glass,its angle of ontat is : a zero aute otuse d right angle 39. The magnitude of I in ampere is : 6 0 I A 1 A 1 0 a d none of these 40. Eletron of mass m and harhe q is travelling with a speed v along a irular path of radius r at right angles to a uniform magneti field of intensity B.If the speed of the eletron is douled and the magneti field is halved the resulting path would have a redius : a 2r 4r r/4 d r/2 41. From the figure desriing photoeletri effet we may infer orretly that : S t o pi n g 4 3 Na A1 p o t e n ti al 2

11 x Frequeny a d Na and A1 oth have the same threshold frequeny Maximum kineti energy for oth the metals depend linearly on the frequeny The stopping potentials are different for Na and A1 for the same hange in frequeny A1 is a etter photo sensitive material than Na 42. Tho oherent light eams of intensity I and 4I are superposed.the maximum and minimum possile intensities in the resulting eam are : a 9 I and I 5 I and I 9 I and 3 I d 5 I and 3 I 43. The eletron in a hydrogen atom makes a transition from n=n 1 to n=n 2 stare.the time period of the eletron in the initial state n 1 is eight times that in the final state n 2.The possile values of n 1 and n 2 a r e : a n 1 = 8,n 2 = 1 n 1 = 4, n 2 = 2 n 1 = 2,n 2 = 4 d n 1 = 1, n 2 = If the forward voltage in a diode is inreased,the width of the depletion region : a inreases flutuates dereases d no hange 45. Two nuleons are at a separation of one farmi.protons have a harge of x C.The net nulear fore etween them is F 1,,if oth are neutrons,f 2 if oth are protons and F 3 if one is proton and the other is neutron.then : a F 1 = F 2 >F 3 F 1 = F 2 = F 3 F 1 < F 2 <F 3 d F 1 >F 2 >F The eletri flux for Gaussian surfae A that enlose the harged partiles in free spae is given q 1 = -14 nc,q 2 = nc,q 3 = -56 nc :

12 Gaussian surfae A Q1 Q 3 Q2 Gaussian surfae B 47. Four metal ondutors have different shapes : a 10 3 N m 2 C C N -1 m x 10 3 Nm 2 C -1 d 6.32 x 10 3 CN -1 m -2 ondutor 48. The potential to whih a ondutor is raised,depends on : a a sphere pear a the amount ylinder d lightning of harge geometry and sije of the ondutor oth a and d only on a 49. The work done in arrying in harge q one round a yle of redius r with a harge Q at the entre is : a π ε π ε π ε d none of these 50. An air filled parallel plate,ondenser has a apaity of 2 pf.the separation of the plates Is douled and the interpae etween the plates is filled with wax.if the apaity is inreased to 6 pf,the dieletri onstant of wax is : a d The energy that should e added to an eletron to redue its de-broglie wavelength from 1 nm to 0.5 nm is :

13 a four times the initial energy equal to the initial energy twie the initial energy d thrie the initial energy 52. Mean life of a radioative sample is 100 s.then its half life in minutes is : a d Consider two nulei of the same radioative nulide.one of the nulei was reated in a supernova explosion 5 illion years ago.the other was reated in a nulear reater 5 minutes ago.the proaility of deay during the next time is : a different for eah nulei first nulei reated in explosion deays first nulei reated in the reator deays d independent of the time of reation 54. Bohar s atom model assumes : is it rest not radiate energy a the nuleus is of infinite mass and eletrons in a quantized orit will 55. Identify the property whih is not harateristis for a semiondutor? mass of eletron remains onstant d all the aove ondition ehaves like an insultor of harge arriers will ause ondutivity and holes in the valene and at higher temperature a At a very low temperatures,it At higher temperatu res two types The harge arriers are eletrons

14 naturally d The semiondutor is eletrially 56. Identify the wrong statement in the following,colom s law orretly desried the eletri fore that : its nuleus the nuleus of an atom moleules a inds the eletrons of an atom to inds the protons and neutrons in inds atoms together to form solids d inds atoms and moleules to form 57. A single slit of width d is illuminated y violet light of wavelength 400 nm and the width of the diffration pattern is measured as y.when half of the slit width is overed illuminated y yellow light of wavelength 600 nm,the width of the diffration pattern is : is zero a the pattern vanishes and the width 3 y d none of the aove 58. At kavalur in India,the astronomers using a telesope whose ojetive had a diameter of one metre started using telesope of diameter 2.54 m.the resulted in : y 2.54 times for the same l 2.54 times for the same l a the inreasin g in the resolving power the inrease in the limiting angle y derease in the resolving power d no effet on the limiting angle 59. when unpolarised light eam is inident from air onto glass n = 1.5 at the polarizing angle :

15 ent a refleted eam is polarized 100 per partially polarized the light is reflated refleted and refrated eams are the reason for a is that almost all d all of the aove 60. Seleted the right option in the following : a Christian Huygens,a ontemporary of Newton estalished the wave theory of light y assuming that light waves were transverse evidene evidene that light is transverse wave proved the wave ehavior of light and Huygens assumption Maxwell provided the theoretial Thomas Young experimentally aove,orretly answer the question what is light? d All the statements g i v e n