The current in a solenoid of 240 turns, having a length of 12 cm and a radius of 2 cm, changes at a rate of `0.8 A s^(-)`. Find the emf induced in it.

Explanation

Since `H=(mu_0 n^2 A )/(6) (di)/(dt)`
`=(4 pixx10^(-7)xx(240)^2xx pixx(2xx10^(-2))^2)/(12xx10^(-2))xx0.8`
`=(4 pixx(24)^2xx pixx4xx8)/(12)xx10^(-8)`
`=60577.3824xx10^(-8)=6xx10^(-4) V.`