Question

A square loop of side 50 cm is placed in a uniform magnetic field of 3·0 T acting perpendicular to the plane of the loop. If the loop is rotated through an angle of \(90^\circ\) in 0·3 s, the value of emf induced in the loop would be :

• A. 0·25 V
• B. 0·50 V
• C. 0·75 V
• D. 1·0 V

Hint:

Always remember that magnetic flux depends on the orientation of the loop: \(\Phi = BA\cos\theta\). When a loop is rotated by \(90^\circ\) from a perpendicular field position, the flux drops completely to zero, making the change in flux equal to the initial flux.

Answer 1

The Correct Option is C