The current in a long solenoid of radius R and having n turns per unit length is given by `i= i_0
Channel: Doubtnut
Date: 2020-07-12

The current in a long solenoid of radius R and having n turns per unit length is given by `i= i_0 sin omega t`. A coil having N turns is wound around it near the centre. Find (a) the induced emf in the coil and (b)  the mutual inductance between the solenoid and the coil.