The magnetic field at the origin due to ...

The magnetic field at the origin due to the current flowing in the wire is

A

`-(mu_0I)/(8pia)(hati+hatk)`

B

`(mu_0I)/(2pia)(hati+hatk)`

C

`(mu_0I)/(8pia)(-hati+hatk)`

D

`(mu_01)/(4piasqrt(2))(-hati+hatk)`

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The correct Answer is:

C

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