Question

1.the ratio of the forces between 2 small spheres with constant charge (a) in air (b) in a medium of dielectric constant K is ?

2.if a soap bubble is given negative charge , then what will happen to its radius?

3.two pt charges at a certain distance r in air exert a force F on each other.Then the distance r at which these charges will exert same force in a medium of dielectric constant k is given by?

4.an electron and a proton are in uniform electric field, the ratio of their acceleratios will be?

5.one metallic sphere A is given positive charge whereas another metallic sphere B of exactly same mass as of A is given equal amount of negative charge then is mass in both of them remain equal or inc. or dec.?

Answer 1

1 .k:1 ,2 .increase ,3 .