A 0.1m long solenoid has a radius of 0.05m and 1.5x10^4 turns. The current in the solenoid changes at a rate of 6.0A/s. A conducting loop of radius 0.0200m is placed at the center of the solenoid by its axis the same as that of the original solenoid.
1. Decide the self-induced emf in the solenoid due to the changing current.
2. What is the magnetic flux during the small loop when the current through the solenoid is 2.5A?