Write down Coulomb’s law in vector form and mention what each term represents.

What are the differences between Coulomb force and gravitational force?

What is meant by ‘electric field lines’?

What is dielectric strength?

What are Polar molecules? Give examples.

What is meant by dielectric breakdown?

(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.

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.

A point charge Q is placed at point O potential difference V_A - V_B is positive. Is the charge Q negative or positive?

What are the factors on which the capacity of a parallel plate capacitor with dielectric depend?

A particle of mass m and charge (-q) enters the region between the two charged plates initrally moving along X-axis with speed Vx as shown in figure. The length of plate is L and an uniform electric field E is maintained between the plates. S.T. vertical deflection of the particle at the far edge of the plate is \(\frac { q{ EL }^{ 2 } }{ 2m{ V }_{ x }^{ 2 } } \).

Body placed at the centre are shown. Identify the polarity of the charge & draw the electric field lines due to it

Will there be any effect on the potential at the point if the medium around this point is changed?

Draw equipotential surface
(i) in a uniform electric field and
(ii) for a point charge (Q < 0)