A solenoid of radius 4.0 cm has 300 turns and a lenght of 25 cm.
A) What is the inductance of the Coil?
B) There is 2 A current in the solenoid. What is the magnetic field inside the coil?
C) The current in the coil is reduced to zero in 0.5 s. What is the induced voltage in the solenoid?