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Question 20171
JEE Physics · Easy

Electromagnetic Induction and Alternating Current: Magnetic Flux MCQ

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Magnetic FluxEasyQuestion 20171

Question

Magnetic flux through a surface of area A in uniform field B at angle θ between B and the normal to the surface is:
  1. A
    BA sinθ
  2. B
    BA cosθ
    Correct
  3. C
    B/A cosθ
  4. D
    BA tanθ

Correct answer

BA cosθ

Explanation

Φ = B·A = BA cosθ. When θ = 0 (B parallel to normal = perpendicular to surface), flux is maximum.

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