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A current 'I' flows along an infinitely ...

A current `'I'` flows along an infinitely long straight conductor. If `'r'` is the perpendicular distance of a point from the lower end of the conductor, then the magnetic induction `B` is given by

A

`B=(mu_(0))/(4pi)(2i)/(r)`

B

`B=(mu_(0))/(4pi)(i)/(r)`

C

`B=(mu_(0))/(4pi)(pii)/(r)`

D

`B=(mu_(0))/(4pi)(2pii)/(r)`

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