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A thin semi-circular ring of radius r ha...

A thin semi-circular ring of radius r has a positive charge q distributed uniformly over it. The net field `vecE` at the centre O is

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
C
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