Question Detail
Question
Which of the following is/are correct about a charge q moving with velocity v in a uniform magnetic field? I. The magnitude and direction of the force F depends on v and q; II. F is independent of v and q; III. F is zero always.
Correct Answer
Option A is the correct answer.
Detailed Explanation
The magnetic force is F = qv×B, which clearly depends on both the charge's magnitude/sign and its velocity, so statement I alone is correct.
Hint
Look directly at the formula F = qv×B — which variables does it depend on?