A non - conducting disc of radius R is u...

A non - conducting disc of radius R is uniformly charged with surface charge density `sigma`. A disc of radius `(R )/(2)` is cut from the disc, as shown in the figure. The electric potential at centre C of large disc will be

`(pi sigmaR)/(2epsilon_(0))`

`(sigmaR)/(2piepsilon_(0))`

`(sigmaR(pi-1))/(2pi epsilon_(0))`

`(sigmaR(pi-1))/(2epsilon_(0))`

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