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Two long wire carrying current `2i` and `i` are placed along co-ordinate axes `x` and `y` respectively. The locus of point where magnetic field is zero is

A

`2y-x=0`

B

`x-2y=0`

C

`y-x=0`

D

`y=0`

Text Solution

Verified by Experts

The correct Answer is:
A

`At P:`
`B_(1)=(mu_(0)i)/(2piy), o.`
`B_(2)=(mu_(0).2i)/(2pix), ox`
`B_(1)=B_(2)`
`(mu_(0)i)/(2piy)=(mu_(0).2i)/(2pix)`
`x=2y implies 2y-x=0`
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