Q.

Figure shows three circular arcs each of radius R and total charge as indicated. Charge +Q on AB, charge -2q on BC and charge +3Q on CD. The electric potential at the centre of the curvature is

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a

Q2πε0R

b

3Q4πε0R

c

5Q4πε0R

d

3Q2πε0R

answer is A.

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Detailed Solution

Net charge +2Q

Potential V=14πε02QR

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Figure shows three circular arcs each of radius R and total charge as indicated. Charge +Q on AB, charge -2q on BC and charge +3Q on CD. The electric potential at the centre of the curvature is