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A straight section PQ of a circuit lise ...

A straight section `PQ` of a circuit lise along the `X`-axis from `x=-a/2` to `x=a/2` and carriers a steady current `i`. The magnetic field due to the section `PQ` at a point `X=+a` will be

A

`propa`

B

zero

C

`propa^(2)`

D

`prop1/a`

Text Solution

Verified by Experts

The correct Answer is:
B

Point P on the extended part of line therefore
`B_(p)=0`
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