One solenoid is centered inside another. The outer one has a length of 55 centimeter and contains 6800 coils, while the coaxial inner solenoid is 4 centimeter long and 0.120 centimeter in diameter and contains 24 coils. The current in the outer solenoid is changing at 34 A/s.
Estimate the mutual inductance of the solenoids?
Estimate the emf induced in the inner solenoid?