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Two long parallel wires are at a disttan...

Two long parallel wires are at a disttance of 1 m. Both of them carry one ampare of current in the same direction. What is the factor of attraction per unit length between the two wores ?

A

`2xx10^(-7)N//m`

B

`2xx10^(-8)N//m`

C

`5xx10^(-8)N//m`

D

`10^(-7)N//m`

Text Solution

Verified by Experts

The correct Answer is:
A
`F/l =(mu_(0))/(4pi) [(2I_(1)I_(2))/(r)]`
`=10^(-7)xx(2xx1xx1)/(1) =2xx 10^(-7)N//m`
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