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) zero
B) 5.0 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 the formula ε = -L * (di/dt), where L is the inductance and di/dt is the rate of change of current. Rearranging for di/dt gives di/dt = ε / L. Substituting the given values, di/dt = 2.0 V / 4.0 mH = 500 A/s.

A 10-Turn Ideal Solenoid Has an Inductance of 4