Three identical point charges are placed at the vertices of an equilateral triangle…

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

Problem

Three identical point charges

+q

are placed at the vertices of an equilateral triangle of side

a

. What is the magnitude of the net force on the charge at one vertex due to the other two? (a)

\dfrac{k q^{2}}{a^{2}}

(b)

\dfrac{k q^{2}\sqrt{3}}{a^{2}}

(c)

\dfrac{2k q^{2}}{a^{2}}

(d)

\dfrac{k q^{2}\sqrt{2}}{a^{2}}