A resistor and an inductor are connected in series to a battery with emf 240 V and negligible internal resistance. The circuit is completed at time t = 0. At a later time t = T the current is 5.00 A and is increasing at a rate of 20.0 A>s. After a long time the current in the circuit is 15.0 A. What is the value of T, the time when the current is 5.00 A?

A resistor and an inductor are connected in series to a battery with emf 240 V and negligible internal resistance. The circuit is completed at time t = 0. At a later time t = T the current is 5.00 A and is increasing at a rate of 20.0 A>s. After a long time the current in the circuit is 15.0 A. What is the value of T, the time when the current is 5.00 A?