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Figure shows a square loop ABCD with edg...

Figure shows a square loop ABCD with edge length `a`. The resistance of the wire ABC is `r` and that of ADC is `2r`. Find the magnetic field B at the centre of the loop assuming uniform wires. `

A

`(sqrt(2)mu_(0)i)/(3pia)o.`

B

`(sqrt(2)mu_(0)i)/(3pia) ox`

C

`(sqrt(2)mu_(0)i)/(pia) o.`

D

`(sqrt(2)mu_(0)i)/(pi a) ox`

Text Solution

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The correct Answer is:
B
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