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The unit of electric current "ampere" is...

The unit of electric current "ampere" is the current which when flowing through each of two parallel wires spaced `1 m` apart in vacuum and of infinite length will give rise to a force between them equal to

A

`1N//m`

B

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

C

`1xx10^(-2)N//m`

D

`4pi xx10^(-7)N//m`

Text Solution

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The correct Answer is:
B
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