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Charge q is uniformly distributed over a...

Charge `q` is uniformly distributed over a thin half ring of radius R. The electric field at the centre of the ring is

A

`q/(2pi^(2)epsilon_(0)r^(2))hat(i)`

B

`q/(4pi^(2)epsilon_(0)r^(2))hat(j)`

C

`-q/(4pi^(2)epsilon_(0)r^(2))hat(j)`

D

`-q/(2pi^(2)epsilon_(0)r^(2))hat(i)`

Text Solution

Verified by Experts

The correct Answer is:
D
`vec(E)=(2k lambda)/r(-hat(j))=2/((4pi in_(0) r))q/((pi r))(-hat(j))`
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