Two point charges and are fixed on a straight line and are apart
PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Two point charges q1=+4.0μC and q2=−2.0μC are fixed on a straight line and are 0.30m apart. A third charge q is to be placed midway between them so that the total electrostatic potential energy of the three-charge system becomes zero. Determine the magnitude and sign of q.