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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

`2.5xx10^(-7)` T southward

B

`2.5xx10^(-7)` T Northward

C

`5xx10^(-6)` T southward

D

`5xx10^(-6)` T Northward

Text Solution

Verified by Experts

The correct Answer is:
C
`B= (mu_(0)I)/(2pir) =(4pi xx10^(-7) xx100)/(2pi xx4)=5 xx10^(-6)T`
From right hand thuumb tule, the direction of the magnetic field will be towards south.
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