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Electric Field Due to an Arc at the Centre

To get the fo...

Question

To get the formula of electric field due to a ring at the centre from the formula of electric field due to an arc at centre, replace $θ$ with .

A

90^{\circ}

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B

180^{\circ}

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C

45^{\circ}

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D

360^{\circ}

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Solution

The correct option is B $180^{\circ}$
A circle is nothing but an arc whose ends make an angle of $+ 180^{\circ}$ and $- 180^{\circ}$ at the centre.

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