Question

When air is replaced bya medium of dielectric constsnt k the force of attraction between two charges seperated by a distance r

Answer 1

Answer:

Hii Dear,

# Question should have following options -

(a) increases k times

(b) remains unchanged

(c) decreases k times

(d) increases k times

◆ Answer -

(c) decreases k times

● Explaination -

Electrostatic force between two charges in air is given by -

F = (1/4πε0) × q1.q2/r^2

Electrostatic force between two charges in medium is given by -

F' = (1/4πε0k) × q1.q2/r^2

F' = [(1/4πε0)q1.q2/r^2] / k

F' = F / k

Therefore, when air is replaced by dielectric medium, electrostatic force decreases by factor k.

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