Three identical positive point charges are placed collinearly at equal separations on…
PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Three identical positive point charges are placed collinearly at equal separations on an insulating straight rod.
Explain, with proper reasoning, whether a point (other than at infinity) exists on the line of the charges where a positive test charge can be kept so that it experiences zero net electrostatic force.