CBSE Class 12 Physics Electrostat Assignment Set B

TEST SERIES (PHYSICS)

ELECTROSTAT 

Q1.Two identical balls A and B are having the charges +3e and –e respectively placed at adistance d apart experience the force F.Both the balls are touched and again placed at same distance apart.find the nature and magnitude of new force?

Q2.Charges 2Q and –Q are placed inside the inner and outer spheres S and S’ respectively. Find the ratio of electric flux through the given spheres.

Q3.The plate of a charged capacitor are connected by a voltmeter.If the plate of the capacitor are moved further apart,what will be the effect on the reading of voltmeter?

Q4.A hollow sphere is charged up to +Q. Find the work done on placing a charge –q from its surface up to its centre.

Q5.Draw electric lines of force for (a)an electric dipole (b)q1q2>0 

Q6.Moment of an electric dipole is 2x10^-4c m.Find the work done in rotating the dipole from position of stable equilibrium to the position of unstable position in a uniform electric field of 10^-3N/C.

Q7.Explain why the potential on the surface of conductor remains same all over its surface? What about the potential inside it?

Q8.Three electric charges -1μc,+2μc and +1μc are placed at the three vertices of an equilateral triangle of side 10cm.Find (a) the energy of the system (b) find the workdone in separating the charges.

Q9.A capacitor is fully charged and battery is disconnected,then distance between its two plates is increased to twice and a dielectric (K=4) completely filled between its two plates,find the change in

(a) charge

(b) energy

(c) potential

(d) electric field between its two plates?

Please refer to the link below for CBSE Class 12 Physics Electrostat Assignment Set B