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**Tips for: Calculation of electric field due to uniform charge distribution**

Charge Q is distributed uniformly on length $l$ of a wire. It is bent in the form of a semicircular ring. Find the electric field at the centre of the ring.

Suppose we have a uniformly charged circular ring of radius $R$ and charge $Q$. The electric field at a distance $x$ from the centre such that $x>>R$ is given by :