A 10-turn ideal solenoid has an inductance of 4.0 mH.To generate an emf of 2.0 V the current should change at a rate of:
A)0 A/s
B)0.5 A/s
C)50 A/s
D)250 A/s
E)500 A/s

Question

Quizplus · Accepted Answer

The emf (ε) induced in a solenoid is given by ε = L * (di/dt), where L is the inductance and di/dt is the rate of change of current. Rearranging gives di/dt = ε / L = 2.0 V / 4.0 mH = 500 A/s.

A 10-Turn Ideal Solenoid Has an Inductance of 4