Question

The electric force acting between two point charges kept at a certain distance in vacuum is 16 N. If the same two charges are kept at the same distance in a medium of dielectric constant 8, the electric force acting between them is ____________ N.

Options

• 1024

• 128

• 16

• 2

Answer 1

The electric force acting between two point charges kept at a certain distance in vacuum is 16 N. If the same two charges are kept at the same distance in a medium of dielectric constant 8, the electric force acting between them is 2 N.

Explanation:

Electric force acting between the two charges is,

`"F" =1/(4piepsilon_0"K") xx ("q"_1 "q"_2)/"r"^2 Rightarrow "F'" = "F"/"K"`

`therefore "Net force on each charge" = 16/8 = 2"N" `