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in Physics by (27.0k points)
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A horizontal overhead power lines carries a current of 90A 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?

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+1 vote
by (24.8k points)
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Best answer

Here, 

i = 90A; 

r = 1.5m

Applying right hand thumb rule, 

Magnetic field acts towards south.

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