Electrostatic Potential and Capacitance

Question 1

Electrostatic Potential Energy

Answer 1

Electrostatic potential energy of a charge q at a point (in the presence of field due to any charge configuration) is defined as the amount of work in bringing the charge q from infinity to that point.

Question 2

Electrostatic potential

Answer 2

Electrostatic potential at a point in the electric field is defined as the amount of work done by an external force in bringing a unit positive charge from infinity to that point without acceleration irrespective of the path followed.

Question 3

What is an equipotential surface?

Answer 3

Any surface over which electric potential remains constant is called an equipotential surface.

A surface with constant value of potential at all points on the surface.

Question 4

What is electrostatic shielding?

Answer 4

Whatever be the charge and field configuration outside, any cavity in a conductor remains shielded from outside electric influence i.e. the field inside the cavity is always zero. This is known as electrostatic shielding