MCQ Questions of 12th Class With Answer and Solution

Dear candidates you will find MCQ questions of 12th Class here. Learn these questions and prepare yourself for coming examinations. You can check the right answer of any question by clicking the option or by clicking view answer button.
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Newbie 

Q. Which one of the following is the unit of electric field?

(A) Coulomb
(B) Newton
(C) Volt
(D) N/C
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Correct Answer - Option (D)

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Q. Three charges + 3q + q and Q are placed on a st. line with equal separation. In order to maket the net force on q to be zero, the value of Q will be :

(A) +3q
(B) +2q
(C) -3q
(D) -4q
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Correct Answer - Option (A)

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Q. If an electric dipole is kept in a uniform electric field then resultant electric force on it is :

(A) always zero
(B) never zero
(C) depend upon capacity of dipole
(D) None
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Correct Answer - Option (A)

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Q. The number of electron-taken out from a body to produce 1 coulomb of charge will be :

(A) 6.25 × 1018
(B) 625 × 1018
(C) 6.023 × 1023
(D) None
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Correct Answer - Option (A)

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Newbie 

Q. The work done in rotating an electric dipole in an electric field:

(A) W = ME (1 – cos θ)
(B) W = ME tan θ
(C) W = ME sec θ
(D) None
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Correct Answer - Option (A)

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Q. If sphere of bad conductor is given charge then it is distributed on:

(A) surface
(B) inside the surface
(C) only inside the surface
(D) None
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Correct Answer - Option (D)

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Q. Electric field in a cavity of metal:

(A) depends upon the surroundings
(B) depends upon the size of cavity
(C) is always zero
(D) is not necessarily zero
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Correct Answer - Option (D)

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Q. The dielectric constant of a metal is:

(A) 0
(B) 1
(C) -1
(D) ∞
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Correct Answer - Option (D)

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Q. 1 coulomb is equal to:

(A) 3 × 109 e.s.u.
(B) \(\frac{1}{3}\) × 109 e.s.u.
(C) 3 × 1010 e.s.u.
(D) \(\frac{1}{3}\) × 1010 e.s.u.
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Correct Answer - Option (A)

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Q. Each of the two point charges are doubled and their distance is halved. Force of interaction becomes p times, w here p is :

(A) 1
(B) 4
(C) 1/16
(D) 16
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Correct Answer - Option (D)

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Table of contents

  1. Which one of the following is the unit of electric field?
  2. Three charges + 3q + q and Q are placed on a st. line with equal separation. In order to maket the n
  3. If an electric dipole is kept in a uniform electric field then resultant electric force on it is :
  4. The number of electron-taken out from a body to produce 1 coulomb of charge will be :
  5. The work done in rotating an electric dipole in an electric field:
  6. If sphere of bad conductor is given charge then it is distributed on:
  7. Electric field in a cavity of metal:
  8. The dielectric constant of a metal is:
  9. 1 coulomb is equal to:
  10. Each of the two point charges are doubled and their distance is halved. Force of interaction becomes

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