Question

Derive an expression for mutual induction of two long coaxial solenoids of same

length wound over each other.​

Answer 1

Answer:

Mutual Inductance of Two Co-axial Solenoids: Consider two long co-axial solenoid each of length l with number of turns N1 and N2 wound one over the other. ... If n1 is number of turns per unit length of outer solenoid and r2 is radius of inner solenoid, then M = N2μπr22.