CBSE Class 12 Physics Foriegn Question Paper 2013 (1)

CBSE Class 12 Physics Foriegn Question Paper 2013 (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.

1. Sketch the electric field lines around a system of two equal positive point charges placed at a distance. 

2. In a certain arrangement a proton does not get deflected while passing through a magnetic field region. Under what condition is this possible ? 

3.The current passing through the wire AB is increasing.In which direction does the induced current flow in the closed loop ? 

4. Two metals M1 and M2 have work functions 2 eV and 4 eV respectively. Which of the two metals has a lower threshold wavelength for photoelectric emission ? 

5. What is a sky wave ? 

6. 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. 

7. How does mutual inductance of a pair of coils kept coaxially at a distance in air change when

(i) the distance between the coils is increased ?

(ii) an iron rod is kept between them ? 

8. A wheel with 10 metallic spokes each 0.5 m long is rotated with angular speed of 120 revolutions per minute in a plane normal to the earth’s magnetic field. If the earth’s magnetic field at the given place is 0.4 gauss, find the emf induced between the axle and the rim of the wheel. 

10. A parallel plate capacitor is charged to V volts by a d.c. source. The capacitor is then disconnected from the source. If the distance between the plates is doubled, state, with reason, how

(i) capacitance, and

(ii) energy stored in the capacitor, will change.  

Please click the link below to download pdf file of CBSE Class 12 Physics Foriegn Question Paper 2013 (1).