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Two parallel wire carrying equal current...

Two parallel wire carrying equal currents in opposite directions are placed at `x=+-a` parralel to y-axis with `z=0`. Magnetic field at origin O is `B_1` and at `P(2a,0,0) is B_2`. Then, the ratio `B_1//B_2` is

A

`-3`

B

`-(1)/(2)`

C

`-(1)/(3)`

D

`2`

Text Solution

Verified by Experts

The correct Answer is:
A
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