CBSE Class 12 Physics Question Paper 2006 (1)

CBSE Class 12 Physics Question Paper 2006 (1). 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.

Q. 1. Write two properties of a material used as a suspension wire in a moving coil galvanometer. 

Q. 2. Name the experiment which establishes the wave nature of a particle. 

Q. 3. Write the S.I. unit for the activity of a radioactive nuclide. 

Q. 4. The a.c. current gain of a transistor is 120. What is the change in the collector current in the transistor whose base current changes by 

Q. 5. Name the underlying principle of the working of an optical fibre. 

Q. 6. Define ‘dielectric constant’ of a medium. Briefly explain why the capacitance of a parallel plate capacitor increases, oii introducing a dielectric medium between the plates. 

Q. 7. Why does a paramagnetic substance display greater magnetisation for the same magnetising field when cooled? How does a diamagnetic substance respond to similar temperature changes? 

Q. 8. Explain how electron mobility changes for a good conductor when (i) the temperature of the conductor is decreased at constant potential difference and (ii) applied potential difference is doubled at constant temperature. 

Q. 9. A capacitor and a resistor are connected in series with an a.c. source. If the potential difference across C, R are 120 V, 90 V rspectively and if the r.m.s. current of the circuit is 3 A, calculate the (i) impedance,   (ii) power factor of the circuit.

Q. 10. Draw the curve showing variation of binding energy/nucleon with mass number of different nuclei. Briefly state, how nuclear fusion and nuclear fission can be explained on the basis of this graph.

Q. 11. Give r for the following:

          (a) Rainbow is never observed on the surface of the Moon.

          (b) The Sun looks reddish at sunrise and sunset as viewed from Earth.

Please click the link below to download pdf file of CBSE Class 12 Physics Question Paper 2006 (1).