two charges 7 μ C and − 2 μ C (and with no external field) placed at ( − 9 c m , 0 , 0 ) and (9 cm, 0,0) respectively.How much work is required to separate the two charges infinitely away from each other ?

Two point charges +10muC and -10muC are separated by a distance of 40 cm in air. How much work is required to separate the two charges infinitely away from each other?

two charges 7 μ C and − 2 μ C placed at ( − 9 c m , 0 , 0 ) and (9 cm, 0,0) respectively. Suppose that the system of charges is now placed in an external field, E=A(1//r^2),A=9 times10^5C . What would the electrostatic energy of the configuration be?

Determine the electrostatic potential energy of a system consisting of two charges 7muC and -2muC (and with no external field) placed at (-9cm,0,0) and (9 cm, 0,0) respectively.

Two charges -q and +q are located at point A(0, 0, -a) and B(0, 0, +a) respectively. How much work is done in moving a test charge from point P(7, 0, 0 ) to Q(-3, 0, 0)?

Two charges -q and +q are located at points (0,0,-a) and (0,0,a) respectively. (c ) 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?

Two point charges of magnitude +q and -q are placed at (-d/2, 0, 0) and (d/2, 0,0) respectively. Find the equation of the equipotential surface where the potential is zero.

Determine the electrostatic potential energy of a system consisting of two charges, 7 muC and -2 mu C (and with no external field) placed at (-9,0,0) cm and (9,0,0) cm respectively.

Two charges 2Q and -Q are placed at the points (a,0,0) and (4a,0,0) respectively. With the two charges situated at the cenres, two spheres of radii 2a and 8a are considered. What is the ratio of electric flux through the surfaces of the two spheres?