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Two parallel wires of length 9 m each ar...

Two parallel wires of length `9 m` each are separated by a distance `0.15 m` .If they carry equal currents in the same direction and exerts a total force of `30xx10^(-7)N` on each other, then the value of current must be

A

`2.5amp`

B

`3.5amp`

C

`1.5amp`

D

`0.5amp`

Text Solution

Verified by Experts

The correct Answer is:
D
`F=10^(-7)xx(2i^(2))/(a)xxlimplies30xx10^(-7)=10^(-7)xx(2i^(2))/(0.15)xx9`
` implies i=0.5A`
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