Two point charges and are kept apart in vacuum

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

Problem

Two point charges

+2\,\mu\text{C}

and

-3\,\mu\text{C}

are kept

0.40\,\text{m}

apart in vacuum. Calculate the magnitude of the force between them. (a)

0.14\,\text{N}

(b)

0.34\,\text{N}

(c)

3.4\,\text{N}

(d)

0.034\,\text{N}