calculate the charge on the Capacitor. 1 score (b)Estimate the steady state current in the 2ohm resistor as show in fig . The internal resistance of the battery is negligible . 2 score
7. Define the term current density of a metallic conductor .deduce the relation connecting current density (J)and Conductivity ( )of the conductor ,when an electric field E, is applied to it. 3scores 8. How are the following e.m. radiations produced , mention one used of them.? (1)Microwaves (2) Ultra – violet rays (3) gamma rays 3scores 9. How does an air bubble behaves inside water? 10. State the principle on which induction coil is constructed. 1 score 1score
11. A man is shaving with his chin 0.4m from a concave magnifying mirror. If the linear magnification is 2.5. What is the radius of curvature of the mirror ? 2 scores
12. (a)How many electrons and neutrons are there in (b) .Can an electron reside inside the nucleus ? ½
© .Can an electron be emitted from the nuclus ? Explain.
1 ½ scores
13. A circular Coil of 50 turns and radius 0.2m carries of current of 12A Find (a) . magnetic field at the centre of the coil and (b) magnetic moment associated...