PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A charge +Q is fixed at (−a,0) on the x-axis, and a charge −2Q is fixed at (+a,0). Determine the ranking, from greatest to least, of the magnitudes of the net electric field at the following three locations:
• P at (0,0)
• R at (0,2a)
• S at (3a,0)