Which one of the following relations correctly gives the electrostatic force ( F )…

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

Problem

Which one of the following relations correctly gives the electrostatic force

\mathbf F

acting on a test charge

q

placed in an electric field

\mathbf E

? (a)

\mathbf F = -q\,\mathbf E

(b)

\displaystyle \mathbf F = \frac{q\,\mathbf E}{4\pi}

(c)

\mathbf F = q\,\mathbf E

(d)

\mathbf F = q\,|\mathbf E|