Questions
A small element is cut from a circular ring of radius R and coulomb charge per unit length. The net electric field at the centre of ring is
detailed solution
Correct option is B
Electric field due to ring at centre before the element is removed = 0E'=electric field at the centre after the element is removed. E''=electric field at the centre due to the element only =λ.Δl4πε0R2Now, E→=E→'+E→''⇒ 0=E'+λ . Δl4πεR2∴ E' = λ . Δl4πε0 . R2Talk to our academic expert!
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