Question

If the flux associated with a coil changes at the rate of 240 Weber in every 2 minutes then the induced emf is

Answer 1

Answer: induced emf= 120v

Explanation:

let flux(Ф1)=0 , at time(t1)=0

let Ф2=240 , at t2=2s.

induced emf = dФ/dt= (Ф2-Ф1)/t2-t1 = (240-0)/(2-0) = 120