Q.A semicircular ring of radius R has uniform charge density λ. The electric field at the centre is

\dfrac{\lambda}{ \pi \epsilon_0 R}

\dfrac{2\lambda}{ \pi \epsilon_0 R}

\dfrac{\lambda}{2 \pi \epsilon_0 R}

\dfrac{\lambda}{ \epsilon_0 R}

The correct solution involves applying the fundamental concept to derive the final value step by step...

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