A 0.30-H inductor and a 200.0- resistor are connected in series to a 9.0-V battery. (a) What

Question:

A 0.30-H inductor and a 200.0-Ω resistor are connected in series to a 9.0-V battery.
(a) What is the maximum current that flows in the circuit?
(b) How long after connecting the battery does the current reach half its maximum value?
(c) When the current is half its maximum value, find the energy stored in the inductor, the rate at which energy is being stored in the inductor, and the rate at which energy is dissipated in the resistor.
(d) Redo parts (a) and (b) if, instead of being negligibly small, the internal resistances of the inductor and battery are 75 Ω and 20.0 Ω, respectively.