12th Class Physics Quiz Ranking Competition

1. Charge is the property associated with matter due to which it produces and experiences

2. The core of transformer is laminated to reduce

3. In an insulator, the forbidden energy gap between the valence band and conduction band is of the order of

4. In an amplitude modulated wave for audio frequency of 500 cycle/second, the appropriate carrier frquency will be

5. A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It will

6. Which of the following is drawback of amplitude modulation?

7. The photoelectric current does not depend upon the
(i) frequency of incident light
(ii) work function of the metal
(iii) stopping potential
(iv) intensity of incident light

8. A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system

9. The electric field inside a spherical shell of uniform surface charge density is

10. Phase difference between voltage and current in a capacitor in an ac circuit is

11. At magnetic poles, the angle of dip is

12. Television signals are

13. Debye is the unit of

14. Photoelectric effect can be explained by

15. To minimise the power loss in the transmission cables connecting the power stations to homes and factories, the transmission cables carry current

16. The cause of the potential barrier in a p-n junction diode is

17. When light is refracted into a medium,

18. A point charge is kept at the centre of metallic insulated spherical shell. Then

19. The mobility of free electrons is greater than that of free holes because

20. The magnetic moment of a bar magnet is thus ...A... to the magnetic moment of an equivalent solenoid that produces the same magnetic field. Here, A refers to