A battery is connected in series with a R = 0.31 ? resistor and an inductor, as shown in the figure below. The switch is closed at t = 0. The time constant of the circuit is ? = 0.20 s, and the maximum current in the circuit is I = 7.9 A. Find the following. (a) the emf of the battery V (b) the inductance of the circuit mH (c) the current in the circuit after one time constant has elapsed A (d) the voltage across the resistor and the voltage across the inductor after one time constant has elapsed resistor V inductor V