Two solenoids, of N1 and N2 turns respectively, are wound on the same form. They have the

Question:

Two solenoids, of N1 and N2 turns respectively, are wound on the same form. They have the same length L and radius r.
(a) What is the mutual inductance of these two solenoids?
(b) If an ac current
I1 (t) = Im sin w t
flows in solenoid 1 (N1 turns), write an expression for the total flux through solenoid 2.
(c) What is the maximum induced emf in solenoid 2?