Give a comparison of electrical and gravitional forces?

What are Non-polar molecules? State examples.

When does a dielectric said to be polarized?

What are Polar molecules? Give examples.

What are induced dipoles.

What is meant by dielectric breakdown?

What is a Capacitor?

When we rotate the blades, it starts to rotate as usual. Why it is so?

(i) Two insulated charged copper spheres A & B of identical size have charges qn and -3q_A respectively. When they are brought in contact with each other and then separated. What are the new charges on them?
(ii) When third sphere of some size but uncharged is brought in contact with first and then second and finally removed? What are the new charges.

What is the electric flux through a cube of side 1 cm which encloses on electric dipole?

A charge Q μC is placed at the centre of a cube what would be the
(i) flux through one face?
(ii) flux passing through two opposite faces of the cube?
Electric flux through whole cube \(\frac { Q }{ { \varepsilon }_{ 0 } } \) 

What orientation of an electric dipole in a uniform electric field corresponds to its
(i) stable and
(ii) unstable equilibrium? Depict the orientations.

(i) Electric field lines donot have sudden breaks why is it so?
(ii) Explain why two field lines never cross each other at any point.

An electric dipole is held in a uniform electric field.
(i) Straight the net force acting on it is zero.
(ii) The dipole is alignment parallel to the field. find the work done in rotating it through the angle of 180^o.

A sphere of charge +Q is fixed. A smaller sphere of charge +q is placed near the larger sphere and released from rest. The small sphere will move away from large sphere with
a. decreasing velocity & decreasing acceleration.
b. decreasing velocity & increasing acceleration.
c. decreasing velocity & constant acceleration
d. increasing velocity & decreasing acceleration
e. increasing velocity & increasing acceleration
Which of the above statement is correct? Explain.