Question

9. Two identical metallic balls A and B have charges +40
and – 10 uC respectively. The distance between them
is 2.0 m. What is the magnitude and type of force
acting between them? They are touched to each other
and again separated by a distance of 2.0 m from each
other. Calculate the new force between them. What
will be the force if one ball is connected to earth?

Answer 1

Answer:

attractive force and the magnitude will be (9e9x40e-6x10e-6)/4

when they are touched the +40 will become 30 and -10 will be 0. so no force

in earth touching case, no force