" A charge "q_(0)" is brought from infinity to the centre of a dipole.The work done is "

A fixed ring of radius R is given a charge q. A charge q_0 is brought slowly from infinity to the centre of the ring. The wrong statement is-

A point charge q is brought slowly from infinity and is placed at the centre of a conducting neutral spherical shell of inner radius a and outer radius b, then find work done by external agent :

A point charge 20 muC is shifted from infinity to a point P in an electric field with zero acceleration. If the potential of that point is 1000 volt, then (i) Find out work done by electric field ? (iii) If the kinetic energy of charge particle is found to increase by 10 mJ when it is brought from infinity to point P, then what is the total work done by external agent ? (iv) What is the work done by electric field in the part (iii) (v) If a point charge 30 muC is released at rest at point P, then find out its kinetic energy at a large distance ?

When a test charge is brough in from infinity along the perpendicular bisector of an electric dipole the work done is

Two point charges of +q each are placed at two diagonally opposite corners of a square. Another two point charges of -q charge each are placed at the two remaining corners. Take the edge length of square equal to l. Calculate (i) work needed to move these charges slowly from an infinite separation to this given configuration. (ii) Assume that four charges at corners of the square are held fixed. Another charge Q is to be moved from infinity to the centre of this square slowly. What additional work is required to do so?

A charge q is moved from A to B in the region of a fixed ideal dipole p. Find the work done on the charge (Assume gravity free space ).

The work done by an external agent to shift a point mass from infinity to the centre of the earth is W . Then choose the correct relation.

[" A shell of radius "R" has a "],[" charge "Q" uniformly "],[" distributed over it."A],[" point charge "q" is placed "],[" at the centre of the shell "],[" The work done to "],[" increase the radius of the "],[" shell from "R" to "2R" is "]