12th Class Physics Electric Charges and Fields Question Bank

done Assertion And Reason (MCQs) - Electric Charges and Fields Total Questions - 8

• question_answer1)

  Directions (Q. No. 1 - 8): In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

  Assertion (A): In a non-uniform electric field, a dipole will have translatory as well as rotatory motion.

  Reason (R): In a non-uniform electric field, a dipole experiences a force as well as torque.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is done clear
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• question_answer2)

  Assertion (A): The basic difference between magnetic lines of force and electric lines of force is electric lines of force are discontinuous and magnetic lines of force are continuous.

  Reason (R): Magnetic lines of force exist in a magnet but no electric lines of force exists in a charged body.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is done clear
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• question_answer3)

  Assertion (A): Electric lines of force cross each other.

  Reason (R): The resultant electric field at a point is the superimposition of the electric fields at that point.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is done clear
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• question_answer4)

  Assertion (A): When bodies are charged through friction, there is transfer of charge from one body to another. No charge is created or destroyed.

  Reason (R): This is according to the law of conservation of electric charge.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is done clear
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• question_answer5)

  Assertion (A): If two spherical conductors of different radii have the same surface charge densities, then their electric field intensities will be equal.

  Reason (R): Surface charge density = \[\frac{Total\ change}{area}\]

   
  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is done clear
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• question_answer6)

  Assertion (A): In a cavity in a conductor, the electric field is zero.

  Reason (R): Charges in a conductor reside only at its surface.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is done clear
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• question_answer7)

  Assertion (A): Three point charges and are shown in the figure. The flux over the Gaussian surface depends on only one charge point.

  Reason (R): Electric flux depends on the all charges nearby.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is done clear
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• question_answer8)

  Assertion (A): Using Gauss law, it is possible to find the electric field at any point.

  Reason (R): Gauss law is applicable for any type of charge distribution.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is done clear
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