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A wire of length l and charge q is bent ...

A wire of length l and charge q is bent in form of a semicircle. The charge is uniformly distributed over the length. The electric field at the centre of semicircle is

A

`q/ (epsilon_0 l^2)`

B

`q/ (2epsilon_0 l^2)`

C

`q/(4 pi epsilon_0 l^2)`

D

`q/(2 pi epsilon_0 l^2)`

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