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What is the magnitude of magnetic field ...

What is the magnitude of magnetic field at the centre O of loop of radius `(sqrt2) m` made of uniform wire when a current of 1 A enters in the loop and is taken out of it by two long wires as shown in Fig.

Text Solution

Verified by Experts

The correct Answer is:
zero
Field due to `I_(1)` and `I_(2)` will be equal any opposite field due to straight wire
`B_(1) = [[mu_(0))/(4pi) (I)/(I) - (mu_(0))/(4pi) (I)/(a) (sqrt2)]o.`
`B_(1) = [[mu_(0))/(4pi) (I)/(I) - (mu_(0))/(4pi) (I)/(a) (sqrt2)]ox`
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