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Q.

A rod with linear charge density 'λ' is bent in the shape of a circular ring. The electric potential at the centre of the circular ring is 

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a

λ∈0

b

λ4∈0

c

λ2∈0

d

2λ∈0

answer is D.

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Detailed Solution

Potential at the center of the ring

Q4πε0r= 2πrλ4πε0r=λ2ε0

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