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))2ϵσ
σQR2ϵσ(√2−1))
σQR2ϵσ(√3−1)
σQRϵσ
A
σQR2ϵσ(√3−1)
B
σQR2ϵσ(√2−1))
C
σQRϵσ
D
σQR(√3−1))2ϵσ
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