A charged particle of mass 1 g is suspended through a silk thread of length 40 cm in a horizontal electric field.fo `4.0 xx 10^4NC^-1`. If the particle stays at a distane of 24 cm from the wall in equilirbium, find the charge on the particle.

A small cork ball with a mass 0.58 g is suspended from a thread 10 cm long. Another ball is fixed at a distance 10 cm from the point of suspension and at a distance of 5 cm from the thread as shown in the figure What shoud the magnitude of the like and equal charges on the balls be t deflect the thread through 30^@ ?

An electric dipole AB consists of charge +-5 separated by a distance of 2xx10^-3m The dipole is placed near a long line charge having linear charge density 4.5 xx 10^-4C m^-1 , such that the negative charge is at a distance OA = 2.5 cm from the line charge. Find the force acting on the dipole.

A pendulum bob of mass 80 mg and carrying a charge of 2xx10^-8 coulomb is at rest in a horizontal uniform electric field of 20,000 V m^-1 . Find the tension in thread of the pendulum and the angle it makes with the vertical.

An electric dipole of length 2 cm is placed with its axis making an angle of 30^@ to a uniform electric field of 10^5NC^-1 . If it experiences a torque of 10sqrt3Nm , calculate the magnitude of the charge on the diple

A particle of mass 10^-3 kg and charge 5 muC is thrown at a speed 20 ms^-1 against a uniform electric field of strength 2xx 10^5 NC^-1 , How much distance will it travel before coming to rest momentarily?

An infinite line charge produces a field of 9xx 10^4 NC^-1 at a distance of 4 cm. Calcualte the linear charge density.

Three particles, each of mass 1g and carrying a charge q , are suspended from a common point by insulating massless strings , each 100 cm long . if the particles are located at the corners of an equilateral triangle of side 3 cm, calculate the charge q on each particle.

The electric field at a point on the axial line at a distance of 10 cm from te centre of an electric dipole is 3.75 xx 10^5NC^-1 in air, while at a distance of 20 cm, the electric field is 3xx10^4NC^-1 . Calculate the length of the electric dipole.