Calculate the magnitude of the electrostatic force between charges and placed apart in air

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Calculate the magnitude of the electrostatic force between charges

+2\,\mu\text{C}

and

+3\,\mu\text{C}

placed

30\,\text{cm}

apart in air. [

k = 9 \times 10^{9}\,\text{N}\,\text{m}^2/\text{C}^2

]