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A horizontal overhead power line carries...

A horizontal overhead power line carries a current of 90 A in east to west direction. What is the magnitude and direction of the magnetic field due to the current 1.5 m below the line?

Text Solution

Verified by Experts

Here `I = 90 A and R = 1.5 m`
`:. B = (mu_0 I)/(2 pi R) = (4 pi xx 10^(-7) xx 90)/(2 pi xx 1.5) = 1.2 xx 10^(-5) T`
As per right hand rule, the magnetic field is directed in horzontal plane towards south.
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