MP Board Half Yearly Examination
Class 12 Physics (PHYSICS) Model Question Paper
Based on the syllabus prescribed for Half Yearly Examination 2022-23
Possible Syllabus for Half Yearly Exam 2022-23 Class 12 Physics (PHYSICS) is as follows
physics
1. Electric charge and field
Chapter 2 Electrostatic Potential and Capacitance
Chapter 3 Electric Current
Chapter 4 Moving Charges and Magnetism Chapter
5. Magnetism and matter
6 Electromagnetic Induction
7. alternating current
8. electromagnetic waves
9. Ray Optics and Optical Instruments
Chapter 10 Wave Optics
Chapter 11 The Dual Nature of Radiation and Matter Chapter
12 nuclear
Note - Questions are not likely to come from the deleted course
CLASS 12 PHYSICS OBJECTIVE QUESTIONS FOR 28 MARKS
Will be asked Objective questions are mainly asked in 4 types
1.Choose the correct option 7 marks
2. Write the answer in one word/sentence 7 marks
3. Fill in the blanks 7 marks
4. match making 7 marks
Apart from this, 8 questions of 2 marks, 4 questions of 3 marks, 1 question of 4 marks and 2 questions of 5 marks will also be asked.
Half Yearly Exam 2022-23
Model question paper
Subject: PHYSICS
Class : 12th
Time-3.00 hours Marks-70
Instructions:-
1. It is compulsory to attempt all the questions.
2. Question no. Internal options are given from 05 to 19.
3. Question no. Marks 01 to 04 are objective type questions. Separate marks are prescribed for each question.
4. Marks for each question are indicated against it.
5. Question no. Answer each question from 05 to 12 in 30-40 words
6.Question no. Answer questions from 13 to 16 in about 75-80 words each.
7.Question no. Answer 17 in about 80-100 words
8. Question no. Answer questions 18 to 19 in about 120-150 words each.
Question 1. Write the correct option- 1×7 = 7
i. The electric field at a distance r from a point charge is directly proportional to
(A) 1/r (B) 1/r 2 (C) 1/r3 (D) 1/r4
II. What is the unit of electric field?
(a) C/N (b) N/C (c) 1/C (d) C/1
III. A moving charge produces -
A. Electric field only B. Magnetic field only C. Electric and magnetic field D. None
iv. The value of earth's potential is -
(a) zero (b) positive (c) negative (d) all the above
v. When a high resistance is connected in series with the coil of the galvanometer, it is made
(a) Voltmeter (b) Ammeter
(c) Galvanometer (d) None of these
vi. Lenz's law is related to -
(A) Law of conservation of charge (B) Law of conservation of energy
(C) Law of conservation of mass (D) Law of conservation of momentum
vii Electromagnetic induction was discovered by -
() Ampere (b) Faraday
(c) Fleming (d) Oersted
Question 2. Fill in the blanks - 1×7 = 7
The dielectric constant of i metal is----------.
I. Joule = Coulomb X -------------
iii. The least distance of distinct vision for a healthy eye is _____.
iv The unit of power of a lens is ------------.
v. The resistance of mercury on increasing the temperature is -----.
vi. Shunts are always connected in -------------------------- sequence?
iii. On drawing the field lines keeping the north pole of a bar magnet towards the geographical south, the neutral point is obtained at the position of -----. ,
Question 3. Match the correct pair 1×7 = 7
A B
Coulomb's law - 4πε0R
Potential Difference of Cell - Planetary Model
Specific Resistance - Beaver
Magnetic Induction - Tesla
Magnetic Flux - Ohm-Meter
Rutherford - V = E-Ir
Capacitance of spherical conductor - 1/4πε0×q1×q2/r²
Question.4. Write answer in one sentence. 1×7 = 7
i. What is the inertia of electricity?
II. Which waves are used to check fingerprint?
iii. Write the formula for linear magnification produced by the lens.
iv. What is the total charge in an electric dipole?
v. What is the minimum energy required for electron emission from a metal surface?
vi Write the relation between the velocity of induction and the intensity of the electric field?
vii. Write the value of Rydberg constant?
Question.5. What is quantumization of charge? (2)
Or
what is charge protection
Question.6. What is equipotential surface? (2)
Or
Write two features of equipotential surface?
Question 7. When the motor vehicle is started, its headlights become dim, why? , (2)
Or
Write Ohm's law?
Question 8. What is called resistance temperature coefficient, write its unit? (2)
Or
Why is manganese used to make authentic resistance?
Question 9. 13. Write Gauss's law related to magnet?
Or
Write any two differences between ammeter and voltmeter? (2)
Question 10. What is self-Induction? (2)
Or
Write two differences between alternating current and direct current
Question 11. What is total internal reflection? (2)
Or
Why does the bottom of a pond filled with water appear to be raised?
Question.12. What is photo cell? (2)
Or
Write any two properties of matter waves.
Question.13. When combing dry hair, the comb starts attracting small pieces of paper but not if the hair is wet, why? (3)
Or
Define electric field lines and write its two important properties.
Question 14. When an electron is placed in an electric field, the intensity of the electric field decreases, why (3)
Or
Prove that the potential at any point in the transverse position of an electric dipole is zero.
Question 15. Write the difference between primary and secondary rainbow. 3
Or
Explain the following for a spherical mirror-
i. Main axis ii. Center of curvature iii. focal length and focus
Question 16. Write the conditions for what is interference.
Or
The intensity ratio of two waves is 1:9, if these two waves interfere, find the ratio of maximum and minimum intensity.
Question 17. What is called the internal resistance of the cell, on what factors it depends, write (4)
Or
Write four differences between the electromotive force and the potential difference of the cell.
Question 18. What will be the effect on the interference pattern in Young's double slit experiment if- (5)
i. If the distance between the two slits is increased
ii move the source to the slit
iii move the screen away from the slitto
iv The width of both the slits should be increase
v A colored source should be replaced by a white light source
Or
Find the expression for the magnifying power of a simple microscope when the final image is
i. built on infinity
ii. Made at minimum distance of clear vision
Question 19. What is self inductance Derive an expression for self inductance of a long solenoid? 5
Or
Explain transformer on the following points
i Named figure ii Principle iii Formula of transformation ratio
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Note-
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