CBSE Class 12 Physics Sample Paper 2014 Set 03

1. Name the physical quantity whose SI unit is volt/meter. Is it a scalar or a vector quantity?

2. A 60W bulb is connected to 220 V supply. How much current does it draw?

3. A piece of wire is redrawn by pulling it until its length is doubled .Compare the new resistance with the original value.

4. Draw the magnetic field lines representing uniform magnetic field

5. Name and state the law, which gives the direction of induced e.m.f. in electromagnetic induction.

6. What should be the nature of the lens and the position of the object if we want its image to be upright, virtual and magnified by a factor 0 < m < 1?

7. What do you mean by ‘modulation’?

8. Label the unlabeled box in the given figure.

9. Derive the expression for torque, acting on the dipole, placed in a uniform  electric field.

10. You are given three capacitors of value 2μF, 3μF, 6μF. With suitable diagram explain how will you connect them to a resultant capacity of 4μF?

11. What is the equivalent resistance between terminals A and C of the given circuit?

12. An a.c. generator consist of a coil of 50 turns, area 2.5m2 rotating at an angular speed of 60 rad/s in uniform magnetic field of B = 0.3 T between two fixed pole pieces. 

(i) Find the maximum current drawn from the generator?

(ii) What will be the orientation of the coil wrt. B to have max and zero magnetic flux?

13. Consider interference between two sources of intensities I and 4I. What will be the intensity at points where phase differences.

14. Rank the following radiations according to their photon energies:

i. Yellow light

ii. Gamma ray

iii. Radio wave

iv. Microwave

15. An electron and an alpha particle have the same de Broglie wavelength associated with them? How are their kinetic energies related to each other? 

Please refer to attached file for CBSE Class 12 Physics Sample Paper 2014 Set C