A Series RL Circuit with Inductance L and Resistance R

Multiple Choice

A series RL circuit with inductance L and resistance R is connected to an emf V. After a time the current reaches a final value of 5.0 A. A second series circuit connected to the same emf V is identical except that the resistor is 4R. The current in the second circuit is

A) 0.80 A.
B) 1.3 A.
C) 1.8 A.
D) 5.0 A.
E) 20 A.