Two point charges q1=+ 3.2 nC and q2= -5.3 nC are 0.2 m apart. Point A is midway between them; point B is 0.09 m from q1 and 0.07 from q2. Take the electric potential to be zero at infinity. Find (a) the potential at point A (b) the potential at point B (c) the work done by the electric field on a charge of 3.5 nC that travels from point A to point B.
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Answer:
electric potential at A = -189 V
Electric potential at B = -361 V
work done by field = 60.2nJ
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