Calculate the potential at a point due to a charge of located away. Hence obtain the work done in bringing a charge of from infinity to the point . Does the answer depend on the path along which the charge is brought?
Two charges and are located apart. At what point on the line joining the two charges is the electric potential zero? Take the potential at infinity to be zero.
Figures and show the field lines of a positive and negative point charge respectively. Give the sign of the potential energy difference of a small negative charge between the points and and
Figures and show the field lines of a positive and negative point charge respectively. Give the sign of the work done by the field in moving a small positive charge from to .
Figure shows the field lines of a positive and negative point charge respectively. Give the sign of the work done by the external agency in moving a small negative charge from to .
Figures and show the field lines of a positive and negative point charge respectively. Does the kinetic energy of a small negative charge increase or decrease in going from to ?
Four charges are arranged at the corners of a square of side. as shown in the figure. charge is brought to the centre of the square, the four charges being held fixed at its corners. How much extra work is needed to do this?