PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Two point charges +5μC and −3μC are kept 0.30m apart in air. A third charge of +1μC is brought from infinity to the point exactly midway between the two fixed charges.
Answer the following questions:
(i) Calculate the electric potential at the midpoint due to the two fixed charges.
(ii) Compute the work required to slowly bring the +1μC charge from infinity to this midpoint.
(iii) Find the total electrical potential energy of the three–charge system after the third charge is in place.