The work done in carrying a charge ‘Q’ once round a circle of radius ‘r’ with charge ‘q’ at the centre of circle is

Question. The work done in carrying a charge ‘Q’ once round a circle of radius ‘r’ with charge ‘q’ at the centre of circle is

a) Q/4πε0r

b) Qq/4πε0r

c) Zero

d) θq/2r

Answer: c) Zero

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