In an ac generator, the number of turns in the coil is 2000 and the area of coil is `0.2 m^(2)`. If the coil is rotated at an angular frequency of `400 S^(-1)` in a magnetic field of `0.5 T`, then what is the peak value of induced emf ?

Options

A. `40,000 V`
B. `60,000 V`
C. `80,000 V`
D. `20,000 V`

Answer

C

Explanation

Here, `N = 200, A = 0.2 m^(2), B = 0.5 T, omega = 400 s^(-1)`
Peak value of induced e.m.f.
`E_(0) = NAB omega`
`= 2000 xx 0.2 xx .5 xx 400 = 80,000 V`