Two point charges of and are placed apart inside a medium whose relative permittivity is

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Two point charges of

+5\,\mu\text{C}

and

-2\,\mu\text{C}

are placed

3\,\text{cm}

apart inside a medium whose relative permittivity is

\varepsilon_r = 6

. What is the magnitude of the electrostatic force between them? (a)

0.167\,\text{N}

(b)

16.7\,\text{N}

(c)

1.67\,\text{N}

(d)

100\,\text{N}