Question

Which of the following is/are true?

• 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.
• D. All the above

Answer 1

Answer: (A), (B)

The correct options are
A Magnetic field exerts force only on a moving charge.
B Electric field exerts force on both stationary and moving charge.

The magnitude of the force is F = qvB sinθ where θ is the angle between the velocity and the magnetic field.

So the force will be zero when the charge is moving in parallel direction of field.