IIT JEE Advanced 2009 Paper 2

(A)→(P), (Q), (T) • Case (P): U = $\frac{1}{2} C V^2$ • Case (Q): Since the work is done on the system, the internal energy increases. • Case (T): time varying $\overset{\rightarrow}{B}$ creates an induced $\overset{\rightarrow}{E}$ causing current to flow. This dissipates heat in the loop: H = $L^2(Rt)$. (B)→(Q): As explained above. (C)→(S) • Case (S): Mass defect is converted into energy which is released. (D)→(S): As explained above.