Physics 12 MCQ of Electrostatic Potential and Capacitance – Chapter 2

Physics 12 MCQ of Electrostatic Potential and Capacitance, For both chapter from unit 1 is prepared for all the peoples who are looking for MCQ Questions and answers. As you know there are two chapters in UNIT I (Electrostatics). From Physics class 12 Unit I Electrostatics we have completed Chapter 1 MCQ questions solved in this page.

  1. Electrostatic Charges and Fields MCQ – Chapter 1

These Questions are for CBSE and all other boards which follows NCERT pattern.

Physics 12 MCQ of Electrostatic Potential and Capacitance – Chapter 2

Ques 1: Electrostatic potential V at a point, distant r from a charge q in air is

  • q/r2
  • q2/r
  • q/r
  • q2/r2

q/r

Ques 2: Work done in carrying an electron from A to B on an equipotential surface of one volt potential is

  • 1 ev
  • 10 eV
  • 1 volt
  • Zero

Zero

Ques 3: The correct relation between electric intensity E and electric potential V is

  • E = -dV/dr
  • E = dV/dr
  • V = -dE/dr
  • V = dE/dr

E = -dV/dr

Ques 4: A charge of 10μC lies at the centre of a square. Work done in carrying a charge of 2μC from one corner of square to the diagonally opposite corner is

  • 20J
  • 5J
  • Zero
  • 20μJ

Zero

Ques 5: A uniform electric field of 100 N/C exists in vertically upward direction. The decrease in electric potential as one goes up through a height of 5 cm is

  • 20 V
  • 120 V
  • 5 V
  • Zero

5 V

Ques 6: When a conductor is held in an electric field, the field inside the conductor is always

  • positive
  • negative
  • constant
  • zero

zero

Ques 7: Charge on a capacitor is doubled. Its capacity becomes k times, where

  • k = 2
  • k = 1
  • k = 1/2
  • k = 4

k = 1

Ques 8: Electrical capacity of earth is

  • 1F
  • 1μF
  • 711μF
  • 9×109μF

711μF

Ques 9: When air in between the plates of a capacitor is replaced by mica of dielectric constant 6, its capacity

  • remains unaffected
  • reduced to 1/6th
  • becomes 6 times
  • non of the above

becomes 6 times

Ques 10: When a number of capacitors are connected in series between two points, all the capacitors possess same

  • capacity
  • potential
  • charge
  • none of the above

charge

Physics 12 MCQ of Electrostatic Potential and Capacitance

Ques 11: When a number of capacitors are connected in parallel between two points, the equivalent capacitance

  • increases
  • decreases
  • remains the same
  • none of the above

increases

Ques 12: A condenser is charged to double its initial potential. The energy stored in the condenser becomes x times, where x =

  • 2
  • 4
  • 1
  • 1/2

4

Ques 13: When two capacitors charged to different potentials are connected by a conducting wire, what is not true?

  • charge lost by one is equal to charge gained by the other
  • potentail lost by one is equal to potentail gained by the other
  • some energy is lost
  • both the capacitor acquire a common potential

potentail lost by one is equal to potentail gained by the other

Ques 14: The relation between dielectric constant K and electric susceptibility χ of a material is

  • K = χ
  • K = 1+χ
  • χ = K+1
  • K2 = (1+χ)(1−χ)

K = 1+χ

Ques 15: When charge is supplied to a conductor, its potential depends upon

  • the amount of charge
  • geometry and size of conductor
  • both (a) and (b)
  • only on (a)

both (a) and (b)

Ques 16: A parallel plate capacitor is charged by a battery. Once it is charged, battery is removed. Now a dielectric material is inserted between the plates of the capacitor. Which of the following does not change?

  • electric field between the plates
  • potential difference across the plates
  • charge on the plates
  • energy stored in the capacitor

Ques 17: A dipole is placed parallel to electric field. If W is the work done in rotating the dipole from 0° to 60°, then work done in rotating it from 0° to 180° is

  • 2W
  • 3W
  • 4W
  • W/2

4W

Ques 18: The variation of potential V with r and electric field with r for a point charge is correctly shown in the graphs

b

Ques 19: A charge Q is supplied to a metallic conductor. Which is true?

  • Electric field inside it is same as on the surface
  • electric potential inside is zero
  • electric potential on the surface is zero
  • electric potential inside is constant

electric potential inside is constant

Ques 20: A parallel plate capacitor C has a charge Q. The actual charges on the plates are

  • Q, Q
  • Q/2, Q/2
  • Q, -Q
  • Q/2, -Q/2

Q, -Q

NCET Physics 12 MCQ of Electrostatic

Ques 21: Three capacitors of capacitances 1μF, 2μF and 3μF are connected in series and a potential difference of 11V is applied across the combination, then the potential difference across the plates of 1μF capacitor is

  • 2V
  • 4V
  • 1V
  • 6V

6V

Ques 22: The potential at the centre of the square is –

  • zero
  • kq/a
  • kq/a2
  • kq/2a2

zero

Ques 23: Two conducting spheres A and B of radii a and b respectively are at the same potential. The ratio of surface charge densities of A and B is

  • b/a
  • a/b
  • a2/b2
  • b2/a2

b/a

Ques 24: Work done to bring a unit positive charge un-accelerated from infinity to a apoint inside electri field is called

  • Electric field
  • Electric potential
  • Capacitance
  • Electric flux

Electric potential

Ques 25: Electric potential due to a point charge -q at distance x from it is given by

  • Kq/x2
  • Kq/x
  • -Kq/x2
  • -Kq/x

-Kq/x

Ques 26: Electric field is always

  • Parallel to equipotential surface
  • Perpendicular to equipotential surface
  • It can be perpendicular and parallel as well
  • It does not depend on distribution of charge

Perpendicular to equipotential surface

Ques 27: Electric field and electric potential inside a charged spherical shell :

  • E = 0; V = 0
  • E = 0; V ≠ 0
  • E ≠ 0; V = 0
  • E ≠ 0; V ≠ 0

E = 0; V = 0

Electrostatic Physics Class 12 MCQ Question and Answers

Ques 28: Shape of equipotential surface in uniform electric field will be :

  • spherical normal to electric field
  • random
  • circular normal to electric field
  • equidistant planes normal to electric field

equidistant planes normal to electric field

Ques 29: On reducing potential across a capacitor, its capacitance

  • decreases
  • increases
  • remains constant
  • first increases then decreases

increases

Ques 30: Energy stored in a charged capacitor is given by

  • U = CV/2
  • U = CV2
  • 2CV2
  • VC2/2

U = CV/2

Ques 31: If n number of equal capacitors each of capacitance C are connected in series, then equivalent capacitance will be given as :

  • nxC
  • C/n
  • n+C
  • n2C

nxC

Ques 32: Capacitance of parallel plate capacitors when there is no medium between the plates is C0. If capacitor is now completely filled with dielectric matter of constant K, the capacitance would be :

  • C0/K
  • KC0
  • K2C0
  • 2KC0

KC0

Physics Chapter Wise MCQ Questions and Answers

  1. Electrostatic Charges and Fields MCQ – Chapter 1
  2. Electrostatic Potential and Capacitance MCQ – Chapter 2
  3. Current Electricity MCQ Question Answer – Chapter 3
  4. Moving Charges and Magnetism MCQ – Chapter 4
  5. Magnetism And Matter MCQ – Chapter 5
  6. Electromagnetic Induction MCQ – Chapter 6
  7. MCQ Alternating Current MCQ – Chapter 7
  8. Electromagnetic Waves MCQ – Chapter 8
  9. Ray Optics And Optical Instruments MCQ – Chapter 9
  10. MCQ Wave Optics MCQ – Chapter 10
  11. Dual Nature of Radiation and Matter MCQ – Chapter 11
  12. Atoms MCQ – Chapter 12
  13. Nuclei MCQ – Chapter 13
  14. Semiconductor Electronics : Materials, Devices And Simple Circuits MCQ – Chapter 14

physics 12 mcq

Physics 12 MCQ of Electrostatic Potential and Capacitance, physics electrostatic MCQ PDF download from here.

Updated: October 17, 2021 — 11:56 am

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