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A horizontal overheadpowerline is at hei...

A horizontal overheadpowerline is at height of `4 m` from the ground and carries a current of `100 A` from east to west. The magnetic field directly below it on the ground is
`( nu_(0) = 4 pi xx 10^(-7) Tm A^(-1)`

A

`5xx10^(-6) T`north ward

B

`5xx10^(-6) T` south ward

C

`2.5xx10^(-7) T` north ward

D

`2.5xx10^(-7) T` south ward

Text Solution

Verified by Experts

The correct Answer is:
B

`B=(mu_(0)i)/(2pid) =(2xx10^(-7)xx100)/(4)`
`=5xx10^(-6) T`, south
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