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The force between two wires is 2xx10^-7N...

The force between two wires is `2xx10^-7N//m`, spaced 1 m apart to each other in vaccum. The electric current flowing through the wire is

A

zero

B

`2xx10^-7A`

C

`5xx10^6A`

D

unit ampere

Text Solution

Verified by Experts

The correct Answer is:
D
`f=2xx10^-7N//m,a=1m,I_1=I_2=?`
`f=(mu_0I_1I_2)/(2pi xxa)`
`2xx10^-7=(4pixx10^-7xxI^2)/(2pi xx 1)`
`I^2=1`
`therefore I = 1A` .
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