Question Detail

PHY 102 Electromagnetic Induction Objective Question

Question

How is magnetic flux calculated when the area is not perpendicular to the magnetic field?
Options
A Φ = BA sin θ
B Φ = BA cos θ
Correct Answer
C Φ = BA tan θ
D Φ = B/A cos θ
Correct Answer

Option B is the correct answer.

Detailed Explanation

The flux through an area A when the normal vector makes an angle θ with the B-field is Φ = B·A·cos θ. This accounts for the effective perpendicular area.

Hint

Cosine of the angle between B and normal.

Question Info