11. A 5 V battery is connected across the points X and Y. Assume D1 and D to the normal silicon diodes. Find the current supplies by the battery if the +ve terminal of the battery is connected to point X. (a) 0.5A (b) 0.43A D 10 D 502 www 12. 13. (c) 0.86A (d) 1.5A Rand CIR 2 2 A diatomic gas, having Cp = R and C = R, is heated at constant pressure. The ratio dU: dQ: dw: (a) 5:7:3 (b) 5:7:2 (c) 3:5:2 (d) 3:7:2 If the time period of a two meter long simple pendulum is 2s, the acceleration due to gravity at the place where pendulum is executing S.H.M. is: (a) 9.8 ms 14. (b) 16 m/s (c) 2 ms (d) ms Two radioactive substances X and Y originally have N and N nuclei respectively. Half life of X is half of the life of Y. After three half lives of Y, number of nuclei of both are equal. N The ratio will be equal to: N (a) 1 (b) 1 (c) 13 (d) 18