Question

A coil having `500` square loops each of side `10 cm` is placed normal to a magnetic flux which increase at the rate of `1.0 "tesla"/"second"`. The induced r.m.f. in volts is
A. `0.1`
B. `0.5`
C. 1
D. 5

Answer 1

Correct Answer - D
Induced emf, `e=-N(dphi)/(dt)`
`|e|=N(dphi)/(dt)=N(d)/(dt)(BA costheta)=N(dB)/(Dt).A costheta`
`=500xx1xx(10xx10^(-2))^(2)cos 0^(@)`
`=5V`