11. A parallel plate capacitor has two layers of different dielectrics as shown in figure. The ratio of potential difference across the dielectric layers when connected to the battery is b Ka (1) (2) Kb Ka (3) (4) 1:1 K,b 12. What would be equivalent resistance across the diagonally opposite corners A and H of a cubical network consisting of 12 resistors, each of resistance 2 k? www (1) k (2) k (3) 2 (4) 13. In the circuit shown in figure, power developed across 1, 2 2 and 3 2 resistance are in the ratio of 302 (1) 1:2:3 (2) 4:2:27 (3) 6:4:9 (4) 2:1:27 14. Which of the following particle will have minimum frequency of revolution when projected with the same velocity perpendicular to a given magnetic field? (1) Electron (3) He+ (2) Proton (4) Li+ 15. Choose the wrong statement for magnetic susceptibility of ferromagnetic material goes through a hysteresis loop. (1) It has a fixed value. (2) It may be zero. (3) (4) It may be infinite. It may be negative.