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A quarter ring of radius R is having uni...

A quarter ring of radius `R` is having uniform charge density `lambda`. Find the electric field and potential at the centre of the ring.

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Refer to the precious question `vec(dE)=dE_(x) hat(i)+dE_(y) hat(j)" ":.` on solving `E_("net")=(K lambda)/R (hat(i)+hat(j))`
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