Class XII_All India_Physics_Set-2

Size: px
Start display at page:

Download "Class XII_All India_Physics_Set-2"

Transcription

1 Class XII_All India_Physics_Set- 17. Draw V I characteristics of a p-n junction diode. Answer the following questions, giving reasons: (i) Why is the current under reverse bias almost independent of the applied potential up to a critical voltage? (ii) Why does the reverse current show a sudden increase at the critical voltage? Name any semiconductor device which operates under the reverse bias in the breakdown region. 3 V-I characteristic of p-n junction diode: (i) Under the reverse bias condition, the holes of p-side are attracted towards the negative terminal of the battery and the electrons of the n-side are attracted towards the positive terminal of the battery. This increases the depletion layer and the potential barrier. However the minority charge carriers are drifted across the junction producing a small current. At any temperature the number of minority carriers is constant so there is the small current at any applied potential. This is the reason for the current under reverse bias to be almost independent of applied potential. At the critical voltage, avalanche breakdown takes place which results in a sudden flow of large current. (ii) At the critical voltage, the holes in the n-side and conduction electrons in the p- side are accelerated due to the reverse bias voltage. These minority carriers acquire sufficient kinetic energy from the electric field and collide with a valence electron. Thus the bond is finally broken and the valence electrons move into the conduction band resulting in enormous flow of electrons and thus formation of hole-electron pairs. Thus there is a sudden increase in the current at the critical voltage. Zener diode is a semiconductor device which operates under the reverse bias in the breakdown region.

2 Class XII_All India_Physics_Set- 18. Define the current sensitivity of a galvanometer. Write its S.I. unit. Figure shows two circuits each having a galvanometer and a battery of 3V. When the galvanometers in each arrangement do not show any deflection, obtain the ratio R 1 /R. 3 Current sensitivity of a galvanometer is defined as the deflection in galvanometer per unit current. Its SI unit is radians/ampere. For balanced wheat stone bridge, there will be no deflection in the galvanometer R1 6 R 9 6 1

3 Class XII_All India_Physics_Set- For the equivalent circuit, when the wheat stone bridge is balanced, there will be no deflection in the galvanometer R 4 8 R 1 R R A wire AB is carrying a steady current of 10 A and is lying on the table. Another wire CD carrying 6 A is held directly above AB at a height of mm. Find the mass per unit length of the wire CD so that it remains suspended at its position when left free. Give the direction of the current flowing in CD with respect to that in AB. [Take the value of g = 10 ms ] 3 Force per unit length between the current carrying wires is given as: o II F 4 r 1, where I 1 = current in wire AB = 10 A and I = current in wire CD = 6 A r = distance between wires = mm = 10-3 m. Let m be the mass per unit length of wire CD. As the force balances the weight of the wire II r m kg m o 1 7 mg 10 m A rectangular conductor LMNO is placed in a uniform magnetic field of 0.5 T. The field is directed perpendicular to the plane of the conductor. When the arm MN of length of 0 cm is moved towards left with a velocity of 10 ms 1, calculate the emf induced in the arm. Given the resistance of the arm to be 5 (assuming that other arms are of negligible resistance) find the value of the current in the arm. 3 OR

4 Class XII_All India_Physics_Set- A wheel with 8 metallic spokes each 50 cm long is rotated with a speed of 10 rev/min in a plane normal to the horizontal component of the Earth s magnetic field. The Earth s magnetic field at the place is 0.4 G and the angle of dip is 60. Calculate the emf induced between the axle and the rim of the wheel. How will the value of emf be affected if the number of spokes were increased? Let ON be x at some instant. The emf induced in the loop = e. d d( Blx) dx e Bl Blv V dt dt dt e 1 Current in the arm, I 0. A R 5 OR o 4 H B cos I 0.4cos G T This component is parallel to the plane of the wheel. Thus, the emf induced is given as, 1 N E Bl, where. t E V 60 The value of emf induced is independent of the number of spokes as the emf s across the spokes are in parallel. So, the emf will be unaffected with the increase in spokes. 1. (a) What is linearly polarized light? Describe briefly using a diagram how sunlight is polarised. (b) Unpolarised light is incident on a polaroid. How would the intensity of transmitted light change when the polaroid is rotated? 3 (a) Natural light is unpolarised i.e. the electric vector takes all possible directions in the transverse plane, rapidly and randomly, during a measurement. A polarizer transmits only one component (parallel to a special axis). This resulting light is called linear or plane polarized.

5 Class XII_All India_Physics_Set- (b) The incident sunlight is unpolarised. The dot and double arrows show the polarization in the perpendicular and in the plane of the figure. Under the influence of the electric field of the incident wave, the electrons in the molecules of the atmosphere acquire components of motion in both these directions. An observer looking at 90 to the direction of the sun, the charges accelerating parallel to the double arrows do not radiate energy towards this observer since their acceleration has no transverse component. The radiation scattered by the molecule is therefore represented by dots. It is linearly polarized perpendicular to the plane of the figure. If the unpolarised light is incident on a Polaroid the intensity is reduced by half. Even if the Polaroid is rotated by angle θ the average over cos θ = ½. Thus from Malus law: I = I 0 cos θ Or, <I> = < I 0 cos θ > = I 0 < cos θ > = I 0 / Thus, the intensity of the transmitted light remains unchanged when the Polaroid is rotated.. Write Einstein s photoelectric equation and point out any two characteristic properties of photons on which this equation is based. Briefly explain the three observed features which can be explained by this equation. 3 Einstein s photoelectric effect equation: (NOTE: Use any one of three given equations) hv K. E o where, h Planck's constant, v frequency of the incoming photons o work function of the material and K.E kinetic energy of the emitted electrons OR

6 Class XII_All India_Physics_Set- 1 hv o mv max where, h Planck's constant, v frequency of the incoming photons 1 o work function of the material, mv max kinetic energy of the emitted electrons vmax maximum velocity of emitted electron OR 1 mv max h ( v vo ) where h Planck's constant, v frequency of the incoming photons 1 vo threshold frequency, mv max kinetic energy of the emitted electrons vmax maximum velocity of emitted electron The two characteristic properties of photons on which this equation is based are as follows: (i) Photons have particle characteristic. It is emitted or absorbed in units called quanta of light. (ii) Photons have wave characteristic. It travels in space with particular frequency, a characteristic of waves. Three observed features which can be explained by this equation are: (i) Solar cells: Also called photo-voltaic cells. It converts solar radiations to electrical emf. (ii) Television telecast: The dark and bright light part of images are interpreted as high and low electrical charges as given by photoelectric emission principle. These are further processed and transmitted. (iii) Burglar alarm: The moment the ultraviolet radiation is cut due to thief, it stops the supply of photons and thus works as off mode and the ring bells automatically. 3. Name the type of waves which are used for line of sight (LOS) communication. What is the range of their frequencies? A transmitting antenna at the top of a tower has a height of 45 m and the height of the receiving antenna is 80 m. Calculate the maximum distance between them for satisfactory communication in LOS mode. (Radius of the Earth = m) 3 Space wave are used for the line of sight (LOS) communication. The range of their frequencies is 40 MHz and above. We have, height of transmitting antenna, h T = 45 m and height of receiving antenna, h R = 80 m

7 Class XII_All India_Physics_Set- Then, maximum distance between the two antennas, d m Rh T+ Rh R d m = km Thus, the maximum distance between the antennas is 56 km. 4. (a) For a given a.c., i = i m sin t, show that the average power dissipated in a (b) resistor R over a complete cycle is 1 im A light bulb is rated at 10 W for a 0 V a.c. supply. Calculate the resistance of the bulb. 3 R. (a) The average power dissipated p i R i Rsin t i R sin t m m 1 sin t (1 cos t) p imr sin t 1 cos t ( cos t 0) (b) Power of the bulb, P = 10 W Voltage, V = 40 V The resistance of the bulb is given as V 40 R 480 P 10

8 Class XII_All India_Physics_Set- 5. Draw a labelled ray diagram of a refracting telescope. Define its magnifying power and write the expression for it. Write two important limitations of a refracting telescope over a reflecting type telescope. 3 Refracting telescope: Magnifying Power: The magnifying power m is the ratio of the angle α subtended at the eye by the final image to the angle β which the object subtends at the lens or the eye. h fo fo m. fe h fe Limitations of refracting telescope over reflecting type telescope: (NOTE: Write any two) (i) Refracting telescope suffers from chromatic aberration as it uses large sized lenses. (ii) The image formed by refracting telescope is less brighter than the image formed by the reflecting type telescope due to some loss of light by reflection at the lens and by absorption. (iii) The resolving power of refracting telescope is less than the resolving power of reflecting type telescope as the mirror of reflecting type telescope has large diameter. (iv) The requirements of big lenses tend to be very heavy and therefore difficult to make and support by their edges. (v) It is also difficult and expensive to make such large sized lenses.

5. You may use the following values of physical constants wherever necessary. Class XII Physics (042) Sample Question Paper

5. You may use the following values of physical constants wherever necessary. Class XII Physics (042) Sample Question Paper Class XII Physics (04) Sample Question Paper 018-19 Time allowed: hours. Max. Marks: 70 General Instructions: 1. All questions are compulsory. There are 7 questions in all.. This question paper has four

More information

Mock Examination Physics 2 nd Book Time 3 Hrs MM : 70

Mock Examination Physics 2 nd Book Time 3 Hrs MM : 70 Mock Examination Physics 2 nd Book Time 3 Hrs MM : 70 SECTION A 1. How does the angle of minimum deviation of a glass prism vary, If the incident violet light is replaced with red light? 2. What is principle

More information

Please write down the Serial Number of the question before attempting it. PHYSICS (Theory) Time allowed : 3 hours Maximum Marks : 70

Please write down the Serial Number of the question before attempting it. PHYSICS (Theory) Time allowed : 3 hours Maximum Marks : 70 Series ONS SET-1 Roll No. Candiates must write code on the title page of the answer book Please check that this question paper contains 16 printed pages. Code number given on the right hand side of the

More information

MARKING SCHEME SET 55/1/MT Q. No. Expected Answer / Value Points Marks Total Marks. Section A

MARKING SCHEME SET 55/1/MT Q. No. Expected Answer / Value Points Marks Total Marks. Section A MARKING SCHEME SET 55//MT Q. No. Expected Answer / Value Points Marks Total Marks Set,Q Set2,Q5 Set,Q4 Section A Set,Q2 Set2,Q4 Set,Q5 Set,Q Set2,Q2 Set,Q Set,Q4 Set2,Q Set,Q2 Set,Q5 Set2,Q Set,Q Set,Q6

More information

CBSE XII Physics 2016

CBSE XII Physics 2016 Time: 3 hours; Maximum Marks: 70 General Instructions: 1. All questions are compulsory. There are 26 questions in all. 2. This question paper has five sections: Section A, Section B, Section, Section D

More information

3. How long will a radioactive isotope, whose half-life is T years, take for its activity to reduce to 1/8 th of its initial value?

3. How long will a radioactive isotope, whose half-life is T years, take for its activity to reduce to 1/8 th of its initial value? No. of printed pages:5 INDIAN SCHOOL SOHAR SECOND TERM EXAM- 2014 PHYSICS THEY CLASS: XII MARKS:70 DATE: 1 /12/2014 TIME:3hrs General Instructions: 1. All questions are compulsory. 2. There are 26 questions

More information

Downloaded from

Downloaded from CBSE EXAMINATION PAPERS ALL INDIA 2011 Time allowed: 3 hours Maximum marks: 70 General Instructions: (a) All questions are compulsory. (b) There are 30 questions in total. Questions 1 to 8 carry one mark

More information

CBSE Board Class XII Physics Set 1 Board Paper Time: 3 hours [Total Marks: 70]

CBSE Board Class XII Physics Set 1 Board Paper Time: 3 hours [Total Marks: 70] CBSE Board Class XII Physics Set 1 Board Paper - 2009 Time: 3 hours [Total Marks: 70] General instructions: 1. All questions are compulsory. 2. There are 30 questions in total. Questions 1 to 8 are very

More information

CBSE Physics Set I Outer Delhi Board 2012

CBSE Physics Set I Outer Delhi Board 2012 Q28. a) In Young s double slit experiment, derive the condition for (I) constructive interference and (II) destructive interference at a point on the screen. b) A beam of light consisting of two wavelengths,

More information

Class XII Physics (Theory)

Class XII Physics (Theory) DATE : 0/03/209 SET-3 Code No. //3 Regd. Office : Aakash Tower, 8, Pusa Road, New Delhi-000. Ph.: 0-4762346 Class XII Physics (Theory) Time : 3 Hrs. Max. Marks : 70 (CBSE 209) GENERAL INSTRUCTIONS :. All

More information

CBSE PHYSICS QUESTION PAPER (2005)

CBSE PHYSICS QUESTION PAPER (2005) CBSE PHYSICS QUESTION PAPER (2005) (i) (ii) All questions are compulsory. There are 30 questions in total. Questions 1 to 8 carry one mark each, Questions 9 to 18 carry two marks each, Question 19 to 27

More information

AISSCE 2016 EXPECTED (SURE SHORT) QUESTIONS WEIGHTAGE-WISE 2016

AISSCE 2016 EXPECTED (SURE SHORT) QUESTIONS WEIGHTAGE-WISE 2016 CLASS: XII AISSCE 2016 Subject: Physics EXPECTED (SURE SHORT) QUESTIONS WEIGHTAGE-WISE 2016 Q3 Section A ( 1 Mark ) A force F is acting between two charges placed some distances apart in vacuum. If a brass

More information

Two point charges, A and B, lie along a line separated by a distance L. The point x is the midpoint of their separation.

Two point charges, A and B, lie along a line separated by a distance L. The point x is the midpoint of their separation. Use the following to answer question 1. Two point charges, A and B, lie along a line separated by a distance L. The point x is the midpoint of their separation. 1. Which combination of charges would yield

More information

Sure-shot questions for SA-2 (Class XII) Physics

Sure-shot questions for SA-2 (Class XII) Physics Sure-shot questions for SA-2 (Class XII) Physics 1. Two point charges q and -2q are kept d distance apart. Find the location of the point relative to charge q at which potential due to this system of charges

More information

PHYSICS 2005 (Delhi) Q3. The power factor of an A.C. circuit is 0.5. What will be the phase difference between voltage and current in this circuit?

PHYSICS 2005 (Delhi) Q3. The power factor of an A.C. circuit is 0.5. What will be the phase difference between voltage and current in this circuit? General Instructions: 1. All questions are compulsory. 2. There is no overall choice. However, an internal choke has been pro vided in one question of two marks, one question of three marks and all three

More information

CBSE Examination Paper

CBSE Examination Paper CBSE Examination Paper Time allowed : 3 hours Maximum marks: 70 General Instructions: Same as CBSE Examination Paper SET I 1. Using the concept of force between two infinitely long parallel current carrying

More information

Sample Question Paper (PHYSICS) CLASS-XII ( ) Time Allowed: 3Hours Maximum Marks: 70

Sample Question Paper (PHYSICS) CLASS-XII ( ) Time Allowed: 3Hours Maximum Marks: 70 Sample Question Paper (PHYSICS) CLASS-XII (2017-18) Time Allowed: 3Hours Maximum Marks: 70 General Instructions 1. All questions are compulsory. There are 26 questions in all. 2. This question paper has

More information

SESSION IMPORTANT QUESTIONS FOR CBSE EXAMINATION

SESSION IMPORTANT QUESTIONS FOR CBSE EXAMINATION SESSION 2012-2013 IMPORTANT QUESTIONS FOR CBSE EXAMINATION CLASS XII PHYSICS Very Important questions are marked in bold letters. Some NCERT questions are also mentioned. 1. A small test is released from

More information

MARKING SCHEME SET 55/1(Compartment) Q. No. Expected Answer / Value Points Marks Total Marks

MARKING SCHEME SET 55/1(Compartment) Q. No. Expected Answer / Value Points Marks Total Marks MARKING SCHEME SET 55/(Compartment) Q. No. Expected Answer / Value Points Marks Total Marks Set,Q Set2,Q5 Set3,Q4 Set,Q2 Set2,Q Set3,Q5 Set,Q3 Set2,Q2 Set3,Q Section A If it were not so, the presence of

More information

Class: XII Physics (042) Marking Scheme Time allowed: 3 hours Maximum Marks: 70

Class: XII Physics (042) Marking Scheme Time allowed: 3 hours Maximum Marks: 70 Class: XII Physics (042) Marking Scheme 208-9 Time allowed: 3 hours Maximum Marks: 70 Q No SECTION A. C/m 2 2. Fractional change in resistivity per unit change in temperature. 3. X-rays Marks Displacement

More information

Physics (Theory) There are 30 questions in total. Question Nos. 1 to 8 are very short answer type questions and carry one mark each.

Physics (Theory) There are 30 questions in total. Question Nos. 1 to 8 are very short answer type questions and carry one mark each. Physics (Theory) Time allowed: 3 hours] [Maximum marks:70 General Instructions: (i) All questions are compulsory. (ii) (iii) (iii) (iv) (v) There are 30 questions in total. Question Nos. to 8 are very

More information

KENDRIYA VIDYALAYA SANGATHAN, HYDERABAD REGION

KENDRIYA VIDYALAYA SANGATHAN, HYDERABAD REGION KENDRIYA VIDYALAYA SANGATHAN, HYDERABAD REGION SAMPLE PAPER 03 (2017-18) SUBJECT: PHYSICS (043) BLUE PRINT : CLASS XII UNIT VSA (1 mark) SA - I (2 marks) SA II (3 marks) VBQ (4 marks) LA (5 marks) Total

More information

Practice Paper-3. Q. 2. An electron beam projected along + X-axis, in a magnetic field along the + Z-axis. What is

Practice Paper-3. Q. 2. An electron beam projected along + X-axis, in a magnetic field along the + Z-axis. What is Practice Paper-3 Q. 1. An electric dipole of dipole moment 20 10 6 cm is enclosed by a closed surface. What is the net flux coming out of the surface? Q. 2. An electron beam projected along + X-axis, in

More information

SECTION-A. 2. How does the angle of minimum deviation of a glass prism vary, if the incident violet light is replaced with red light?

SECTION-A. 2. How does the angle of minimum deviation of a glass prism vary, if the incident violet light is replaced with red light? No. of printed pages:4 INDIAN SCHOOL SOHAR SECOND TERM EXAM- 2015 PHYSICS THEY CLASS: XII MARKS:70 DATE: 29 /11/2015 TIME:3hrs General Instructions: 1. All questions are compulsory. 2. There are 26 questions

More information

PHYSICS. Downloaded From: Time Allowed : 3 Hrs. Max. Marks 60

PHYSICS. Downloaded From:   Time Allowed : 3 Hrs. Max. Marks 60 PHYSICS Time Allowed : Hrs. Max. Marks 60 * Candidates are required to give their answers in their own words as far as practicable. * Marks allotted to each question are indicated against it. Special Instructions

More information

STD : 12 TH GSEB PART A. 1. An electric dipole is placed in a uniform field. The resultant force acting on it...

STD : 12 TH GSEB PART A. 1. An electric dipole is placed in a uniform field. The resultant force acting on it... STD : 1 TH PHYSICS RJ VISION PVT. LTD. (MOST STABLE & INNOVATIVE INSTITUTE) GSEB COURSE NAME: 1 TH Total Marks : 100 Time : 3 hrs PART A Multiple Choice uestions : 1. An electric dipole is placed in a

More information

1P22/1P92 Exam Review Problems 2013 Friday, January 14, :03 AM. Chapter 20

1P22/1P92 Exam Review Problems 2013 Friday, January 14, :03 AM. Chapter 20 Exam Review Problems 2011 Page 1 1P22/1P92 Exam Review Problems 2013 Friday, January 14, 2011 10:03 AM Chapter 20 True or false? 1 It's impossible to place a charge on an insulator, because no current

More information

XII PHYSICS (FOREIGN 2015) SET-2

XII PHYSICS (FOREIGN 2015) SET-2 XII PHYSICS (FOREIGN 2015) SET-2 Time allowed : 3 hours Maximum Marks : 70 General Instructions : (i) There are 26 questions in all. All questions are compulsory. (ii) This question paper has five sections

More information

CBSE QUESTION PAPER. PHYSICS (Theory)

CBSE QUESTION PAPER. PHYSICS (Theory) CBSE QUESTION PAPER PHYSICS (Theory) Time allowed : 3 hours Maximum Marks : 70 General Instructions: (i) (ii) (iii) All questions are compulsory. There are 30 questions in total. Questions 1 to 8 carry

More information

CBSE_2014_SET_3 Physics

CBSE_2014_SET_3 Physics CBSE_2014_SET_3 Physics 1. A conducting loop is held below a current carrying wire PQ as shown. Predict the direction of the induced current in the loop when the current in the wire is constantly increasing.

More information

Chapter wise Theoretical Important Questions in Physics for Class-XII

Chapter wise Theoretical Important Questions in Physics for Class-XII Electrostatics- 1. Derive an expression for the electric field at a point on the axial position of an electric dipole. 2. Derive an expression for the electric field at a point on the equatorial position

More information

DEHRADUN PUBLIC SCHOOL I TERM ASSIGNMENT SUBJECT- PHYSICS (042) CLASS -XII

DEHRADUN PUBLIC SCHOOL I TERM ASSIGNMENT SUBJECT- PHYSICS (042) CLASS -XII Chapter 1(Electric charges & Fields) DEHRADUN PUBLIC SCHOOL I TERM ASSIGNMENT 2016-17 SUBJECT- PHYSICS (042) CLASS -XII 1. Why do the electric field lines never cross each other? [2014] 2. If the total

More information

2. Q. 1 to 5 are Very short Answer type questions (1 Mark each. ) 3. Q. 6 to 12 are short Answer type questions. (2 Marks each. )

2. Q. 1 to 5 are Very short Answer type questions (1 Mark each. ) 3. Q. 6 to 12 are short Answer type questions. (2 Marks each. ) 1. All questions are compulsory. 2. Q. 1 to 5 are Very short Answer type questions (1 Mark each. ) 3. Q. 6 to 12 are short Answer type questions. (2 Marks each. ) 4. Q. 13 to 24 are short answer questions

More information

CBSE Sample Paper 1. Question 4 What are the maximum and minimum values of power factor in a LCR circuit and under what conditions?

CBSE Sample Paper 1. Question 4 What are the maximum and minimum values of power factor in a LCR circuit and under what conditions? CBSE Sample Paper General Instruction:. Answer all questions. Internal choices are provided for some questions 3. Question numbers to 8 are very short answer questions and carry mark each. 4. Question

More information

PHYSICS. Paper 1 (THEORY) Three hours and a quarter

PHYSICS. Paper 1 (THEORY) Three hours and a quarter PHYSICS Paper 1 (THEORY) Three hours and a quarter (The first 15 minutes of the examination are for reading the paper only. Candidates must NOT start writing during this time). -------------------------------------------------------------------

More information

INTERNATIONAL INDIAN SCHOOL, RIYADH XI XII BOYS SECTION GRADE: XII WORKSHEET SUBJECT: PHYSICS

INTERNATIONAL INDIAN SCHOOL, RIYADH XI XII BOYS SECTION GRADE: XII WORKSHEET SUBJECT: PHYSICS INTERNATIONAL INDIAN SCHOOL, RIYADH XI XII BOYS SECTION 2018-19 GRADE: XII WORKSHEET SUBJECT: PHYSICS 1 ELECTRIC FIELDS AND CHARGES 1. What is the force between two small charged spheres having charges

More information

Grade XII Foreign SET 1. Physics (Theory)

Grade XII Foreign SET 1. Physics (Theory) Physics (Theory) [Time allowed: 3 hours] [Maximum marks:70] General Instructions: (i) All questions are compulsory. (ii) Marks for each question are indicated against it. (iii) Question number 1 to 8 are

More information

KENDRIYA VIDYALAYA SANGATHAN, HYDERABAD REGION

KENDRIYA VIDYALAYA SANGATHAN, HYDERABAD REGION KENDRIYA VIDYALAYA SANGATHAN, HYDERABAD REGION SAMPLE PAPER 1 (217-18) SUBJECT: PHYSICS (43) BLUE PRINT : CLASS XII UNIT VSA (1 mark) SA - I (2 marks) SA II (3 marks) VBQ (4 marks) LA (5 marks) Total I

More information

PHYSICS (Theory) Time Allowed: 3 hours Maximum Marks: 70

PHYSICS (Theory) Time Allowed: 3 hours Maximum Marks: 70 Sample Paper (CBSE) Series PHY/SP/1D Code No. SP/1-D PHYSICS (Theory) Time Allowed: hours Maximum Marks: 70 General Instructions: (i) (ii) (iii) (iv) (v) All questions are compulsory. This question paper

More information

BLUE-PRINT II XII Physics

BLUE-PRINT II XII Physics BLUE-PRINT II XII Physics S.No. UNIT VSA SA I SA II LA Total (1 Mark) (2 Marks) (3Marks) (5 Marks) 1. Electrostatics 1(1) 4(2) 3(1) - 8(4) 2. Current Electricity - 2(1) - 5(1) 7(2) 3. Magnetic Effect of

More information

Chapter wise Theoretical Important Questions in Physics for. Class-XII. Electrostatics

Chapter wise Theoretical Important Questions in Physics for. Class-XII. Electrostatics Chapter wise Theoretical Important Questions in Physics for Class-XII Electrostatics 1. Derive an expression for the electric field at a point on the axial position of an electric dipole. 2. Derive an

More information

SAMPLE PAPER III. Time : 3 hours Max. Marks : 70

SAMPLE PAPER III. Time : 3 hours Max. Marks : 70 SAMPLE PAPER III Time : 3 hours Max. Marks : 70 General Instructions All questions are compulsory. 1. Draw the equipotential surfaces for two point charges each of magnitude q > 0 placed at some finite

More information

3.E: Good. What is internal resistance? S: The resistance offered by the electrodes and electrolyte of a cell is called internal resistance.

3.E: Good. What is internal resistance? S: The resistance offered by the electrodes and electrolyte of a cell is called internal resistance. Physics Practical viva-voce Questions-2019 Live Example- Potentiometer (Assuming that the student was assigned the experiment To determine the internal resistance of a primary cell( which can not be recharged)

More information

MOCK cet paper II 2012 (PHYSICS)

MOCK cet paper II 2012 (PHYSICS) MOCK cet paper II 2012 (PHYSICS) 1. The equations of two sound waves are given by Y 1 = 3 sin 100πt and Y 2 = 4 Sin 150 πt. The ratio of the intensities of sound produced in the medium is 1)1:2 2) 1:4

More information

PHYSICS Course Structure Units Topics Marks Electrostatics Current Electricity III Magnetic Effect of Current & Magnetism

PHYSICS Course Structure Units Topics Marks Electrostatics Current Electricity III Magnetic Effect of Current & Magnetism PHYSICS Course Structure Units Topics Marks I Chapter 1 Chapter 2 II Chapter 3 III Chapter 4 Chapter 5 IV Chapter 6 Chapter 7 V Chapter 8 VI Chapter 9 Electrostatics Electric Charges and Fields Electrostatic

More information

General Instructions :

General Instructions : Class XII Subject - Physics General Instructions : 1. All questions are compulsory. 2. Q. 1 to 5 are Very short Answer type questions (1 Mark each. ) 3. Q. 6 to 12 are short Answer type questions. (2 Marks

More information

MARKING SCHEME SET 55/1/G Q. No. Expected Answer / Value Points Marks Total Marks

MARKING SCHEME SET 55/1/G Q. No. Expected Answer / Value Points Marks Total Marks MARKING SCHEME SET 55//G Q. No. Expected Answer / Value Points Marks Total Marks Set,Q Set2,Q5 Set,Q2 Set,Q2 Set2,Q4 Set,Q5 Set,Q Set2,Q2 Set,Q4 Set,Q4 Set2,Q Set,Q Set,Q5 Set2,Q Set,Q Set,Q6 Set2,Q7 Set,Q0

More information

CBSE Sample Paper 8. c = ms -1 h = Js e = C

CBSE Sample Paper 8. c = ms -1 h = Js e = C 1 CBSE Sample Paper 8 General Instruction: 1. Answer all questions 2. Internal choices are provided for some questions 3. Question numbers 1 to 8 are very short answer questions and carry 1 mark each.

More information

CBSE XII Physics 2015

CBSE XII Physics 2015 Time: 3 hours; Maximum Marks: 70 General Instructions: 1. All questions are compulsory. There are 26 questions in all. 2. This question paper has five sections: Section A, Section B, Section, Section D

More information

1. The diagram shows the electric field lines produced by an electrostatic focussing device.

1. The diagram shows the electric field lines produced by an electrostatic focussing device. 1. The diagram shows the electric field lines produced by an electrostatic focussing device. Which one of the following diagrams best shows the corresponding equipotential lines? The electric field lines

More information

KENDRIYA VIDYALAYA SANGATHAN AHMEDABAD REGION 50 SURE SHOT QUESTIONS (LONG ANSWER TYPE)

KENDRIYA VIDYALAYA SANGATHAN AHMEDABAD REGION 50 SURE SHOT QUESTIONS (LONG ANSWER TYPE) KENDRIYA VIDYALAYA SANGATHAN AHMEDABAD REGION 50 SURE SHOT QUESTIONS (LONG ANSWER TYPE) 1. Define electric field intensity and electric dipole moment. Derive expression for electric field intensity at

More information

PHYSICS. SGC Education center Pushpak Tutorial Super25 Concept. Roll No.

PHYSICS. SGC Education center Pushpak Tutorial Super25 Concept. Roll No. Roll No. Please check that this question paper contains 7 printed pages Please check that this question paper contains 26 questions. Please write down the Serial Number of the question before attempting

More information

Chapter 22. Induction

Chapter 22. Induction Chapter 22 Induction Induced emf A current can be produced by a changing magnetic field First shown in an experiment by Michael Faraday A primary coil is connected to a battery A secondary coil is connected

More information

GURU GOBIND SINGH PUBLIC SCHOOL

GURU GOBIND SINGH PUBLIC SCHOOL GURU GOBIND SINGH PUBLIC SCHOOL SECTOR V/B, BOKARO STEEL CITY Class XII Sub : Physics Assignment Chapter 01 ( Electrostatics) 1. What is a dielectric? Why does the capacitance of a parallel plate capacitor

More information

MARKING SCHEME SET 55/1/1 (Compartment) Q. No. Expected Answer / Value Points Marks Total Marks. Section A Kinetic energy will not be affected.

MARKING SCHEME SET 55/1/1 (Compartment) Q. No. Expected Answer / Value Points Marks Total Marks. Section A Kinetic energy will not be affected. MARKING SCHEME SET 55// (Compartment) Q. No. Expected Answer / Value Points Marks Total Marks Set,Q Set2,Q4 Set3,Q3 Set,Q2 Set2,Q5 Set3,Q4 Set,Q3 Set2,Q Set3,Q5 Set,Q4 Set2,Q2 Set3,Q Section A Kinetic

More information

For more sample papers visit :

For more sample papers visit : For more sample papers visit : www.4ono.com PHYSCS Paper 1 (THEORY) (Three hours) (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time)

More information

PRE-BOARD EXAMINATION STD : XII MARKS : 150

PRE-BOARD EXAMINATION STD : XII MARKS : 150 PRE-BOARD EXAMINATION STD : XII MARKS : 150 SUB : PHYSICS TIME : 3.00 Hrs I.Choose the correct answer: 30x1=30 1.Which of the following quantities not a scalar? a)electric flux b) electric potential c)

More information

Name Final Exam May 1, 2017

Name Final Exam May 1, 2017 Name Final Exam May 1, 217 This test consists of five parts. Please note that in parts II through V, you can skip one question of those offered. Some possibly useful formulas appear below. Constants, etc.

More information

Preview from Notesale.co.uk Page 4 of 35

Preview from Notesale.co.uk Page 4 of 35 field 64 If a dielectric is inserted b/w the plates of a charged capacitor, its Remains Becomes infinite capacitance constant decreases increases 65 Selenium is an insulator in the dark but when exposed

More information

60 IMPORTANT QUESTIONS OF PHYSICS-CLASS XII

60 IMPORTANT QUESTIONS OF PHYSICS-CLASS XII 60 IMPORTANT QUESTIONS OF PHYSICS-CLASS XII Q1. Plot a graph showing the variation of coulomb force (F) versed (1/r 2 ), where r is the distance between the two charges of each pair of charges (1µC, 2µC)

More information

MARKING SCHEME SET 55/1/RU Q. No. Expected Answer / Value Points Marks Total Marks

MARKING SCHEME SET 55/1/RU Q. No. Expected Answer / Value Points Marks Total Marks MARKING SCHEME SET 55//RU Q. No. Expected Answer / Value Points Marks Total Marks Set, Q Set2,Q5 Set,Q4 Section A Self inductance of the coil is numerically equal to magnetic flux linked with it when unit

More information

PHYSICS HIGHER LEVEL

PHYSICS HIGHER LEVEL PRE-LEAVING CERTIFICATE EXAMINATION, 2009 PHYSICS HIGHER LEVEL Ti m e : 3 h o u r s Answer three questions from section A and five questions from section B. Page 1 of 8 SECTION A (120 marks) Answer three

More information

PHYSICSCATALYST.COM. CBSE Sample Paper 9

PHYSICSCATALYST.COM. CBSE Sample Paper 9 CBSE Sample Paper 9 General Instruction: 1. Answer all questions 2. Internal choices are provided for some questions 3. Question numbers 1 to 8 are very short answer questions and carry 1 mark each. 4.

More information

CBSE Annual Examination Question Paper 2013

CBSE Annual Examination Question Paper 2013 CBSE Annual Examination Question Paper 2013 PHYSICS (THEY) Time allowed: 3 hours] [Maximum marks: 70 General Instructions: (i) All questions are compulsory. (ii) There are 29 questions in total. Question

More information

DELHI PUBLIC SCHOOL, BAHADURGARH Sample Paper 1 PHYSICS CLASS-XII Date- Duration:3hr

DELHI PUBLIC SCHOOL, BAHADURGARH Sample Paper 1 PHYSICS CLASS-XII Date- Duration:3hr SET: 1 General Instructions:- DELHI PUBLIC SCHOOL, BAHADURGARH Sample Paper 1 PHYSICS CLASS-XII Date- Duration:3hr All questions are compulsory. There are 30 questions in total. Questions 1 to 8 carry

More information

Engage Education Foundation

Engage Education Foundation B Free Exam for 2013-16 VCE study design Engage Education Foundation Units 3 and 4 Physics Practice Exam Solutions Stop! Don t look at these solutions until you have attempted the exam. Any questions?

More information

CBSE Sample Paper 7. Question 1 What is the ratio of radii of the orbits corresponding to first excited state and ground state in a hydrogen atom?

CBSE Sample Paper 7. Question 1 What is the ratio of radii of the orbits corresponding to first excited state and ground state in a hydrogen atom? 1 CBSE Sample Paper 7 General Instruction: 1. Answer all questions 2. Internal choices are provided for some questions 3. Question numbers 1 to 8 are very short answer questions and carry 1 mark each.

More information

Unit 8: Electromagnetism

Unit 8: Electromagnetism Multiple Choice Portion Unit 8: Electromagnetism 1. Four compasses are placed around a conductor carrying a current into the page, as shown below. Which compass correctly shows the direction of the magnetic

More information

SRI VIDYA COLLEGE OF ENGINEERING AND TECHNOLOGY VIRUDHUNAGAR Department of Electronics and Communication Engineering

SRI VIDYA COLLEGE OF ENGINEERING AND TECHNOLOGY VIRUDHUNAGAR Department of Electronics and Communication Engineering SRI VIDYA COLLEGE OF ENGINEERING AND TECHNOLOGY VIRUDHUNAGAR Department of Electronics and Communication Engineering Class/Sem:I ECE/II Question Bank for EC6201-ELECTRONIC DEVICES 1.What do u meant by

More information

Phys 132: Supplementary Exercises

Phys 132: Supplementary Exercises Phys 132 Fall 2017 Phys 132: Supplementary Exercises 1 Charged spheres Various identical metal spheres are separated and charged. The excess charges on each sphere, whose charges have the same magnitude,

More information

PHYSICS (Theory) Time Allowed: 3 hours Maximum Marks: 70

PHYSICS (Theory) Time Allowed: 3 hours Maximum Marks: 70 Sample Paper (CBSE) Series PHY/SP/1B Code No. SP/1-B PHYSICS (Theory) Time Allowed: hours Maximum Marks: 70 General Instructions: (i) (ii) (iii) (iv) (v) All questions are compulsory. This question paper

More information

Sample Question Paper. Class XII -Physics. (Applicable for March 2016 Examination) Time Allowed: 3 Hours Maximum Marks: 70

Sample Question Paper. Class XII -Physics. (Applicable for March 2016 Examination) Time Allowed: 3 Hours Maximum Marks: 70 Sample Question Paper Class XII -Physics (Applicable for March 2016 Examination) Time Allowed: 3 Hours Maximum Marks: 70 General Instructions 1. All questions are compulsory. There are 26 questions in

More information

8. Use of calculators is not permitted. However, you may ask log table for Mathematical tables.

8. Use of calculators is not permitted. However, you may ask log table for Mathematical tables. 1. All questions are compulsory. 2. Q. 1 to 5 are Very short Answer type questions (1 Mark each. ) 3. Q. 6 to 12 are short Answer type questions. (2 Marks each. ) 4. Q. 13 to 24 are short answer questions

More information

PHYSICS HIGHER LEVEL

PHYSICS HIGHER LEVEL *P16* PRE-LEAVING CERTIFICATE EXAMINATION, 2011 PHYSICS HIGHER LEVEL TIME: 3 HOURS Answer three questions from section A and five questions from section B. Page 1 of 9 SECTION A (120 marks) Answer three

More information

Write your class, index number and name in the spaces at the top of this page. For Examiner s Use

Write your class, index number and name in the spaces at the top of this page. For Examiner s Use 1 DUNMAN HIGH SCHOOL Preliminary Examinations Year 6 Higher 1 CANDIDATE NAME CLASS INDEX NUMBER PHYSICS Paper 2 Structured Questions Candidates answer on the Question Paper. No Additional Materials are

More information

XXXXXXXXXXXXXXX. First Pre-Board Examination, Physics

XXXXXXXXXXXXXXX. First Pre-Board Examination, Physics Series SSO Code No. 55/1/B Roll No. Candidates must write the code on the title page of the answer book General Instructions: Please check that this question paper contains 6 printed pages. Code number

More information

Chapter Modern Physics

Chapter Modern Physics 121 Chapter Modern Physics 1. Diameter of a plano-convex lens is 6 cm and thickness at the centre is 3 mm. If speed of light in material of lens is 2 10 8 m/s, the focal length of the lens is [2013] 15

More information

c = m/s h = Js e = C µ 0 = 4 π 10 7 T ma l ε 0 = C 2 N 1 1 = N m 2 C 2 me = 9.

c = m/s h = Js e = C µ 0 = 4 π 10 7 T ma l ε 0 = C 2 N 1 1 = N m 2 C 2 me = 9. CLASS: XII SUBJECT: PHYSICS MAX. MARKS: 70 TIME: 3 Hours General Instructions: (i) All questions are compulsory. There are 2 questions in all. (ii) This question paper has five sections: Section A, Section

More information

Impedance/Reactance Problems

Impedance/Reactance Problems Impedance/Reactance Problems. Consider the circuit below. An AC sinusoidal voltage of amplitude V and frequency ω is applied to the three capacitors, each of the same capacitance C. What is the total reactance

More information

GOVIND VIDYALAYA TAMULIA XII PHYSICS

GOVIND VIDYALAYA TAMULIA XII PHYSICS GOVIND VIDYALAYA TAMULIA XII PHYSICS Time : 3 Hours Max. Marks : 70 General Instructions (a) All questions are compulsory. (b) There are 30 questions in total. Questions 1 to 8 carry one mark each, questions

More information

Note: For this part students must share their own experience.

Note: For this part students must share their own experience. 26. White travelling back to his residence in the car, Dr. Pathak was caught up in a thunderstorm. It became very dark. He stopped driving the car and waited for thunderstorm to stop. Suddenly he noticed

More information

YOUR NAME Sample Final Physics 1404 (Dr. Huang)), Correct answers are underlined.

YOUR NAME Sample Final Physics 1404 (Dr. Huang)), Correct answers are underlined. YOUR NAME Sample Final Physics 1404 (Dr. Huang)), Correct answers are underlined. Useful constants: e=1.6 10-19 C, m e =9.1 10-31 kg, m p =1.67 10-27 kg, ε 0 =8.85 10-12 C 2 /N m 2, c=3 10 8 m/s k e =8.99

More information

1 Fig. 3.1 shows the variation of the magnetic flux linkage with time t for a small generator. magnetic. flux linkage / Wb-turns 1.

1 Fig. 3.1 shows the variation of the magnetic flux linkage with time t for a small generator. magnetic. flux linkage / Wb-turns 1. 1 Fig. 3.1 shows the variation of the magnetic flux linkage with time t for a small generator. 2 magnetic 1 flux linkage / 0 10 2 Wb-turns 1 2 5 10 15 t / 10 3 s Fig. 3.1 The generator has a flat coil

More information

1. If the mass of a simple pendulum is doubled but its length remains constant, its period is multiplied by a factor of

1. If the mass of a simple pendulum is doubled but its length remains constant, its period is multiplied by a factor of 1. If the mass of a simple pendulum is doubled but its length remains constant, its period is multiplied by a factor of 1 1 (A) 2 (B) 2 (C) 1 (D) 2 (E) 2 2. A railroad flatcar of mass 2,000 kilograms rolls

More information

PHYS 1444 Section 02 Review #2

PHYS 1444 Section 02 Review #2 PHYS 1444 Section 02 Review #2 November 9, 2011 Ian Howley 1 1444 Test 2 Eq. Sheet Terminal voltage Resistors in series Resistors in parallel Magnetic field from long straight wire Ampére s Law Force on

More information

UNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics

UNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics UNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics Physics 115.3 Physics and the Universe FINAL EXAMINATION December 9, 011 NAME: (Last) Please Print (Given) Time: 3 hours STUDENT

More information

= 8.89x10 9 N m 2 /C 2

= 8.89x10 9 N m 2 /C 2 PHY303L Useful Formulae for Test 2 Magnetic Force on a moving charged particle F B = q v B Magnetic Force on a current carrying wire F B = i L B Magnetic dipole moment µ = NiA Torque on a magnetic dipole:

More information

Ch 17 Problem Set 31. A toaster is rated at 600 W when connected to a 120-V source. What current does the toaster carry, and what is its resistance?

Ch 17 Problem Set 31. A toaster is rated at 600 W when connected to a 120-V source. What current does the toaster carry, and what is its resistance? Ch 17 Problem Set 31. A toaster is rated at 600 W when connected to a 120-V source. What current does the toaster carry, and what is its resistance? 33. How many 100-W lightbulbs can you use in a 120-V

More information

tip conducting surface

tip conducting surface PhysicsAndMathsTutor.com 1 1. The diagram shows the tip of a scanning tunnelling microscope (STM) above a conducting surface. The tip is at a potential of 1.0 V relative to the surface. If the tip is sufficiently

More information

Physics 102 Spring 2007: Final Exam Multiple-Choice Questions

Physics 102 Spring 2007: Final Exam Multiple-Choice Questions Last Name: First Name: Physics 102 Spring 2007: Final Exam Multiple-Choice Questions 1. The circuit on the left in the figure below contains a battery of potential V and a variable resistor R V. The circuit

More information

3. Anaemia can be diagnosed by (a) 15 P 31 (b) 15 P 32 (c) 26 Fe 59 (d) 11 Na 24. (b) α particle (Alpha particle)

3. Anaemia can be diagnosed by (a) 15 P 31 (b) 15 P 32 (c) 26 Fe 59 (d) 11 Na 24. (b) α particle (Alpha particle) MARCH 2010 PHYSICS Time Allowed: 3 Hours Maximum Marks: 150 PART - I 30 x 1 = 30 Note: i) Answer all the questions. ii) Choose and write the correct answer. 1. Electron microscope works on the principle

More information

NEW HORIZON PRE UNIVERSITY COLLEGE LESSON PLAN FOR THE ACADEMIC YEAR Department of PHYSICS (II PUC)

NEW HORIZON PRE UNIVERSITY COLLEGE LESSON PLAN FOR THE ACADEMIC YEAR Department of PHYSICS (II PUC) NEW HORIZON PRE UNIVERSITY COLLEGE LESSON PLAN FOR THE ACADEMIC YEAR 2017 2018 Department of PHYSICS (II PUC) Week Month: June 4 Electric charges and properties Coulomb s law superposition principle Electric

More information

PHYSICS QUESTION PAPER CLASS-XII

PHYSICS QUESTION PAPER CLASS-XII PHYSICS QUESTION PAPER CLASS-XII Time : 3.00 Hours] [Maximum Marks : 100 Instructions : 1. There are A, B, C and D sections, containing 60 questions in this question paper. 2. Symbols used in this question

More information

SAMPLE PAPER-05 (solved) PHYSICS (Theory) Class XII. Time allowed: 3 hours Marks: 70

SAMPLE PAPER-05 (solved) PHYSICS (Theory) Class XII. Time allowed: 3 hours Marks: 70 SAMPLE PAPER-05 (solved) PHYSICS (Theory) Class XII Time allowed: 3 hours Marks: 70 Maximum General Instructions: a) All the questions are compulsory. b) There are 26 questions in total. c) Questions 1

More information

Sample Question Paper 3 Class XII Physics

Sample Question Paper 3 Class XII Physics Sample Question Paper 3 Class XII Physics Time allowed: 3hrs Maximum Marks: 70 General Instructions: 1. All questions are compulsory. There are 26 questions in all. 2. This question paper has five sections:

More information

Personalised Learning Checklists AQA Physics Paper 2

Personalised Learning Checklists AQA Physics Paper 2 4.5.1 Forces and their interactions 4.5.2 Work done and energy transfer AQA Physics (8463) from 2016 Topics P4.5. Forces Topic Student Checklist R A G Identify and describe scalar quantities and vector

More information

Waves Final Review. Name: Date: 1. On which one of the following graphs is the wavelength λ and the amplitude a of a wave correctly represented?

Waves Final Review. Name: Date: 1. On which one of the following graphs is the wavelength λ and the amplitude a of a wave correctly represented? Name: Date: Waves Final Review 1. On which one of the following graphs is the wavelength λ and the amplitude a of a wave correctly represented? A. Displacement λ a Distance along wave B. Displacement λ

More information

AQA Physics A-level Section 12: Turning Points in Physics

AQA Physics A-level Section 12: Turning Points in Physics AQA Physics A-level Section 12: Turning Points in Physics Key Points Discovery of electrons A discharge tube contains a low-pressure gas with a high potential difference across it. Electrons are pulled

More information

p-n junction biasing, p-n I-V characteristics, p-n currents Norlaili Mohd. Noh EEE /09

p-n junction biasing, p-n I-V characteristics, p-n currents Norlaili Mohd. Noh EEE /09 CLASS 6&7 p-n junction biasing, p-n I-V characteristics, p-n currents 1 p-n junction biasing Unbiased p-n junction: the potential barrier is 0.7 V for Si and 0.3 V for Ge. Nett current across the p-n junction

More information

Core Concept. PowerPoint Lectures to accompany Physical Science, 8e. Chapter 7 Light. New Symbols for this Chapter 3/29/2011

Core Concept. PowerPoint Lectures to accompany Physical Science, 8e. Chapter 7 Light. New Symbols for this Chapter 3/29/2011 PowerPoint Lectures to accompany Physical Science, 8e Chapter 7 Light Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Core Concept Light is electromagnetic radiation

More information