A charge of 8 mC is located at the origin. Calculate the work done in taking a small charge of `-2 xx 10^-9 C` from a point P (0, 0, 3 cm) to a point Q (0, 4 cm, 0), via a point R (0, 6 cm, 9 cm).

Calculate the potential at a point P due to a charge of 4xx10^-7 C located 9 cm away as shown in the figure.

Calcualte the potential at a point P due to a charge of 4 xx 10^(-7) C located 9 cm away. Hence obtain the work done in bringing a charge of 2xx10^-9C from infinity to the point P. Does the answer depend on the path along which the charge is brought?

Find thr electric potential of a point if 2J of work is done in bringing a charge of 0.2C from infinity to that point.

Two charges -q and +q are located at points (0, 0, -a) and (0, 0, a), respectively. How much work is done in moving a small test charge from the point (5,0,0) to (-7,0,0) along the x-axis? Does the answer change if the path of the test charge between the same points is not along the x-axis?

Show that the point :- (4, 3), (2, 0) and (- 4,-9) are collinear.

ABCD is a square of side 0.2 m. Charges of 2xx10^-9, 4xx10^-9, 8 xx 10^-9 coulomb are placed at the corners. A,B and C respectively. Calculate the work required to transfer a charge of 2xx10^-9 coulomb from corner D to the centre of the square.

Calculate the field due to an electric dipole of length 10 cm and consisting of charges of ne 100 muC at a point 20 cm from each charge.

A 500 mu C charge is at the centre of a square of side 10 cm. find the work done in moving the charge of 10 mu C between two diagonally opposite points on the square.

5J work is done in moving a positive charge of 0.5 C between two points. What is the potential difference between these points?