In the circuit shown, initially the switch is in position 1 for a long time. Then the switch is shifted to position 2 for a long time. Find the total heat produced in R$_2$.
After long time in positin1 the current inthe circuit is E/R$_1$
So in position 2 alsote current frm inductor would be E / R$_1$
Hence the heat produced in R$_2$ would be $ER_2 ^2/R_1$
But the answer given as $LE^2 /2R_1 ^2$