Question

A number of turns in a generator coil are $10$. The area of this coil is $4\times {10}^{-2}{m}^2$. This coil is rotating at the rate of $20$rotations/sec, about an axis lying in its own plane in a perpendicular magnetic field of $0.3$ Tesla. The maximum emf induced in the coil will be :

• A. $30.2V$
• B. $zero$
• C. $15.1V$
• D. $60.4V$

Answer 1

The correct option is C $15.1V$

max emf = $nAB\omega =10\times 0.04\times 0.3\times 2\pi 20=15.079V$