A point charge is surrounded symmetrically by six identical charges at distance `r` as shown in the figure How much work is done by the froces of electrostatic repulsion when the point charge at the centre is removed to infinity ?

Positive point charges are placed at the vertices of a star shape as shown in the figure. Direction of the electrostatic force on a negative point charge at the centre O of the star is

A point charge Q is placed at the centre of a circular wire of radius R having charge q . Find the force of electrostatic interaction between point charge and the wire.

What would be the work done if a point charge + q is taken from a point A to the point on the circumference of a circle with another point charge +q at the centre?

What whould be the work done, if a point charge .+q. is taken from a point A to a point B on the circumference of a circle drawn with another point charge +q at the centre?

Inside a neutral hollow conducting sphere of radius X and centre C, a point charge q is placed as shown in the figure. Another point charge q_1 , is placed outside the sphere at distance d from centre. The net- electrostatic force on charge q placed at the centre is K=1/(4piepsilon_0)

Inside a neutral hollow conducting sphere of radius X and centre C, a point charge q is placed as shown in the figure. Another point charge q_1 , is placed outside the sphere at distance d from centre. The net- electrostatic force on charge q placed at the centre is K=1/(4piepsilon_0)

Shows that how the electrostatic potential varies with r for a point charge.

How much work is done when a charge of 1muC is moved through 1cm on a charged conducting sphere?