A 45-MH Inductor Is Connected to an Ac Source of Emf

Multiple Choice

A 45-mH inductor is connected to an ac source of emf with a frequency of 250 Hz and a maximum emf of 20 V.If the voltage across the inductor is zero at time t = 0, what is the voltage at time t = 2.0 ms? Assume the phase constant is zero.

A) −20 V
B) −10 V
C) 0 V
D) 10 V
E) 20 V