Question

$A \: charged \: metallic \: Bob \: of \: mass \: \\ m \: and \: charge \: Q \: is \: in \: \\ equilibrium \: in \: presence \: of \: electric \\ repulsion \: by \: Q \: ( fixed ) \: as \: shown \\ in \: the \: figure. \: Then \: Find \: Q \: = \: ?$ ​​

Answer 1

Answer:

Correct option is

D

None

Answer 2

Answer:

4

Explanation:

Given in attachments.