PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
The vertices A, B and C of an equilateral triangle of side 0.20m carry point charges qA=+6μC, qB=−3μC and qC=+2μC respectively.
(a) For the charge at A, calculate the force exerted on it by the charge at B and the force exerted on it by the charge at C; express each force in terms of its magnitude and direction with reference to one chosen side of the triangle.
(b) Using your results from part (a), obtain the magnitude and direction of the net force acting on the charge at A.