CBSE Class 12 Physics Foriegn Question Paper 2013 Set 02

CBSE Class 12 Physics Foriegn Question Paper 2013 (2). Students can download the last year question papers using the link below. Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations. 

1. A current carrying loop is free to turn in a uniform magnetic field B. Under what conditions, will the torque acting on it be

(i) minimum (ii) maximum ? 

2. What is the significance of a ‘Q’ factor in a series LCR resonant circuit ? 

3. If the intensity of the incident radiation on a photosensitive surface is doubled, how does the kinetic energy of the emitted electrons get affected ? 

4. What is the main function of a Modem ? 

5. Define ‘electric flux’. Give its S.I. unit.

6.Point charge, Q, is kept in free space at the centre of a cubic Gaussian surface of side l. What is the electric flux through one of its faces ? 

7. At an airport, a person is made to walk through the door way of a metal detector, for security reasons. If the person is carrying anything made of metal, the metal detector emits sound. On what principle does this detector work ? Explain. 

8. Two polaroids P1 and P2 are placed 90° to each other. Find the transmitted intensity if a third polaroid P3 is placed between P1 and P2 bisecting the angle between them. 

9. Derive an expression for the electric field at a point lying on the equatorial axis of an electric dipole. Hence write the expression for the electric field due to a small electric dipole at a far off point.

Please click the link below to download pdf file of CBSE Class 12 Physics Foriegn Question Paper 2013 (2).