A sensitive instrument is to be shielded from the strong electrostatic fields in its environment. Suggest a possible way.

A sensitive instrument is influenced by a nearby strong electric field. Suggest a possible way to prevent the influence.

A sensitive electric instrument is influenced by the strong electric field. Write a possible way to prevent this effect.

From the defination of an electric field, show that its unit in Si is V.m^(-1)

Two point A and B are situated at distance 1 m and 2m form the source of an electrostatic field. The field at a distance x from the source is E = (5)/(x^2) . What is the potential difference between A and B?

An electron travelling west to east enters a chamber having u uniform electrostatic field in the north to south direction. Specify the direction in which a uniform magnetic field should be set up to prevent the electron from deflection from is straight line path.

Derive and expression for electric field at a distance r from the centre of a short dipole along its axis and hence prove that the ratio of electric fields in axial position to equatorial position of dipole is is 2:1 .

A molecule of a substance has permanent dipole moment p. A mole of this substance is polarised by applying a strong electrostatic field E. The direction of the field is suddenly changed by an angle of 60^(@) . If N is the Avogadro's number the amount of work done by the field is