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  4. The current is flowing in south direction along a power line. The direction of magnetic field above the power line (neglecting earths field) is:

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Q. The current is flowing in south direction along a power line. The direction of magnetic field above the power line (neglecting earths field) is:

Punjab PMETPunjab PMET 2004Moving Charges and Magnetism

Solution:

The direction of magnetic field is always perpendicular to the direction of the flow of the current. Hence, the direction of magnetic field is east.