An LR Circuit Contains an Ideal 60-V Battery,a 51-H Inductor

Multiple Choice

An LR circuit contains an ideal 60-V battery,a 51-H inductor having no resistance,a 21-Ω resistor,and a switch S,all in series.Initially,the switch is open and has been open for a very long time.At time t = 0 s,the switch is suddenly closed.When the voltage across the resistor is equal to the voltage across the inductor,what is the current in the circuit?

A) 1.4 A
B) 0.57 A
C) 1.1 A
D) 0.86 A
E) 1.7 A