Question

As the coil rotates in a magnetic field $B$, the effective area of the loop (the face perpendicular to the field) is

• A. $A\cos \theta$
• B. $A\sec \theta$
• C. $A\tan \theta$
• D. $A\cot \theta$

Answer 1

Answer: (A)

Correct answer is (a) $A\cos \theta$