5.(a) Draw the binding energy per nucleon curve. From the curve, show that energy release (10) per nucleon during fusion process is greater than that of the fission process. 5.(b) In the case of successive radioactive disintegration derive an expression for first daughter (12) element at any instant of time. 5.(c) The half-life of radon is 3.8 days. After what time will a sample of radon become - of (08) its original value? 6.(a) Applying Biot-Savart law, find an expression for the magnetic field due to a long straight (13) wire carrying a current. 6.(b) Between Biot-Savart law and Ampere's law which one is more convenient to find the (08) magnetic field of a current carrying conductor. Argue your answer. 6.(c) A coil of 500 turns has an inductance of 15 mH. Determine (i) the flux produced in the (09) core when a current of 2A flows in the coil and (ii) the value of the self-induced emf in the coil when the current is changed from +2A to -2A in 10 ms