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A current of 1//4pi amp is flowing in a ...

A current of `1//4pi` amp is flowing in a long straight conductor. The line integral of magnetic induction around a closed path enclosing the current carrying conductor is

A

`10^(-7)` weber per meter

B

`4pixx10^(-7)` weber per metre

C

`16pi^(-2)xx10^(-7)` webre/metre

D

zero

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The correct Answer is:
A
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