9. An inductor, a 1 k ohm resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is
A. 4 V
B. 12 V
C. 6 V
D. 0 V
9. An inductor, a 1 k ohm resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is
A. 4 V
B. 12 V
C. 6 V
D. 0 V