Two point charges A and B of value of `+15 mu C and +9 mu C` are kept 18 cm apart in air. Calculate the work done when charge B is moved by 3cm towards A.

Two point charges A and B of value +3muC and +2muC are kept 25cm apart in air. Calculate the work done when charge B is moved by 5cm towards A

Two charges 6muC and 3muC are kept 9 cm apart in free space. Calculate the work done to move 3muC" by "3cm towards 9muC .

Two point charges A and B of values +5times10^(-9)C and +3times10^(-9)C are kept 6cm apart in air When the charge B is moved by 1cm towards charge A ,then work done is equal to:

Two charges of 5muC and 20muC are placed 20 cm apart. Calculate the work done in bringing the charges closer to 15 cm apart.

Two point charges A and B of +5 nC and +3 nC are kept at 6 cm apart in air medium. The work required to move charge B towards charge A through 1 cm is :

Two point charges 6 mu C and 2 mu C are separated by 3 cm in free space. Calculate the work done in separating them to infinity.