Question

A square loop of 10 turns has each side 10 cm. It rotates in a magnetic field of 0.25T and the maximum induced emf is 20 mV the angular speed of rotation is

• A. 4 rad/s
• B. 0.4 rad/s
• C. 8 rad/s
• D. 0.8 rad/s

Answer 1

Answer: (D)

0.8 rad/s

Answer 2

$\omega = \frac{E_0}{BAN} = \frac{20 \times 10^{-3}}{0.25 \times (0.1)^2 \times 10}$ = 0.8 rad/s