Q149 / 160 · TS EAMCET 2021 (05 Aug Shift 2) · Physics

Given the fact that
A) Magnetic field exerts force only on a moving charge
B) Electric field exerts force on both stationary and moving charge
C) Magnetic field exerts force on charge moving parallel to the direction of the field.
Which of the following is true?

  • A
    A and C
  • Correct answer
    B
    A and B
  • C
    B and C
  • D
    A, B and C

Solution

(A). Magnetic field exerts force only on a moving charge and that is given by, F→=qv→×B→
(B). Electric field acts on both stationary and moving charge.

(C). Magnetic force is given by, F→=qv→×B→, so if v is parallel to B, force will be zero.

So only A & B is correct.

Hence, the correct answer is option: 'B'.

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