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A semicirxular wire of radius a having l...

A semicirxular wire of radius a having `lambda`as charge per unit length Is shown in the figure. Find the electric potential at the centre of the semicircular wire.

A

`(lambda)/(4epsi_(0))`

B

`(lambda)/(4piepsi_(0)R)`

C

`(lambda)/(4epsi_(0))`

D

none of these

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figure
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