Two fixed point charges lie on the -axis: +6 μC at cm and –3 μC at cm
PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Two fixed point charges lie on the x-axis: +6 μC at x=0 cm and –3 μC at x=8 cm. A small positive test charge could be placed at any of three positions on the same axis:
• Point A: x=2 cm
• Point B: x=5 cm
• Point C: x=12 cm
Without performing explicit calculations, rank the magnitudes of the net electrostatic force that the test charge would experience at Points A, B, and C from greatest to least, and state the direction of the net force at each point ("toward +x" or "toward –x").