NEET Physics: Physics Class 12: Magnetism questions with solutions

Q1. Assertion A stationary charged particle in a magnetic field does not experience a force. Reason The force acting on a charged particle does not depend on velocity of the particle

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Answer: Assertion is correct but Reason is incorrect

A stationary charge has zero velocity, so the magnetic force qvB sinθ is zero. The reason is false because magnetic force does depend on velocity; in fact, it is proportional to it.