Three point charges are placed on a straight line: at

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

Problem

Three point charges are placed on a straight line:

+q

x=0

+q

x=0.10\,\text{m}

, and

-2q

x=0.20\,\text{m}

. Without performing any numerical calculation, predict whether the net force on the charge at

x=0.10\,\text{m}

is toward the left, toward the right, or zero. Justify your choice.