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Question 20234
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Magnetism: Magnetic Force — Sign MCQ

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Magnetic Force — SignEasyQuestion 20234

Question

If a negative charge moves anti-parallel to a magnetic field B, the magnetic force on it is:
  1. A
    Along B
  2. B
    Anti-parallel to B
  3. C
    Perpendicular to B
  4. D
    Zero
    Correct

Correct answer

Zero

Explanation

F = q(v × B). If v is anti-parallel to B, then v × B = 0 → force = 0.

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