Question

A coil of resistance $8\,\Omega$, number of turns 250 and area $120 \text{ cm}^2$ is placed in a uniform magnetic field of 2 T such that the plane of the coil makes an angle of $\frac{\pi}{6}$ with the direction of the magnetic field. In a time of 100 ms, the coil is rotated until its plane becomes parallel to the direction of the magnetic field. The current induced in the coil is

• A. 5.25 A
• B. 3.75 A
• C. 2.75 A
• D. 1.25 A

Hint:

Be careful with the angle given. If it is the "angle of the plane with the field" ($\alpha$), the angle for flux ($\theta$) is $90^\circ - \alpha$.

Answer 1

The Correct Option is B