Solve this
Q. A coil of inductance L = 2.0 $\mu$H and resistance R = 1$\Omega$ is connected to an ideal source of constant emf $\epsilon$ = 3 V as shown in the figure. The amount of heat produced in the coil after the switch S is disconnected, is

(1) 1 $\mu$J
(2) 3 $\mu$J
(3) 10 $\mu$J
(4) 50 $\mu$J