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Question

There is a uniformly charged disc of radius R√3 and surface charge density σ work done by electric field to brought a charge ϱ From centre of disc to distance R along its axis will be :-σQR(√3−1))2ϵσσQR2ϵσ(√2−1))σQR2ϵσ(√3−1)σQRϵσ

A
σQRϵσ
B
σQR(31))2ϵσ
C
σQR2ϵσ(31)
D
σQR2ϵσ(21))
Solution
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