In: Physics
A solenoidal coil with 20 turns of wire is wound tightly around another coil with 320 turns. The inner solenoid is 21.0 cm long and has a diameter of 2.50 cm . At a certain time, the current in the inner solenoid is 0.140 A and is increasing at a rate of 1800 A/s .
For this time, calculate the mutual inductance of the two solenoids;
For this time, calculate the emf induced in the outer solenoid by the changing current in the inner solenoid.