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

Multiple Choice

As shown in the figure, a circuit consists of a resistor $R = 17 \Omega$ in series with an ideal inductor $L = 49 \mathrm { H }$ having no resistance. At time $t = 0 \mathrm {~s}$ , there is a 12-A current in the circuit. At that instant, what is the rate of change of the current?

A) $- 19 \mathrm {~A} / \mathrm { s }$
B) $- 35 \mathrm {~A} / \mathrm { s }$
C) $- 4.2 \mathrm {~A} / \mathrm { s }$
D) $- 27 \mathrm {~A} / \mathrm { s }$
E) $- 12 \mathrm {~A} / \mathrm { s }$