With two point charges held apart

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

Problem

With two point charges held

0.080\,\text{m}

apart, the force between them in vacuum is measured to be

1.5\,\text{N}

. After a transparent liquid completely fills the region between the charges, the force drops to

0.50\,\text{N}

. Determine the dielectric constant

\kappa

of the liquid.