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A horizontal overhead powerline is at he...

A horizontal overhead powerline 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

`2.5xx10^(-7)T` southward

B

`5.0xx10^(-6)T` northward

C

`5.0xx10^(-6)T` southward

D

`2.5xx10^(-7)T`, northward

Text Solution

Verified by Experts

The correct Answer is:
C
`B=(mu_(0)I)/(2pir)=2xx10^(-7)xx100/4=5xx10^(-6)T`, southward
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