JEE Main 2015 Question Paper

An inductor (L = 0.03 H) and a resistor (R = 0.15 kΩ) are connected in series to a battery of 15V EMF in a circuit shown. The key K1 has been kept closed for a long time. Then at t=0,K1 is opened and key K2 is closed simultaneously. At t = 1 ms, the current in the circuit will be: (e5≅150)