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MCQ Practice Question

A positive charge of 2 C moves at 3 m/s perpendicular to a uniform magnetic field of 4 T. The magnetic force magnitude is?

A6 N
B8 N
C12 N
D24 N

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Correct Answer: D. 24 N

Explanation: F=qvB sin90°=2×3×4=24 N.

Reference: Standard electromagnetic theory: lorentz force

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