As Shown in the Figure, a Circuit Consists of a Resistor

Multiple Choice

As shown in the figure, a circuit consists of a resistor $R = 22 \Omega$ in series with an ideal inductor $L = 31 \mathrm { H }$ having no resistance. At time $t = 0 \mathrm {~s}$ , there is a 12-A current in the circuit. At time $t = 5.0 \mathrm {~s}$ , what is the emf across the inductor?

A) $7.0 \mathrm {~V}$
B) $7.6 \mathrm {~V}$
C) $6.3 \mathrm {~V}$
D) $8.2 \mathrm {~V}$
E) $8.9 \mathrm {~V}$