A current through a horizontal powerline flows in west to east direction. What is the direction of magnetic field at a point, when viewed from the west end?
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ok here is the answer
Explanation:
The current is in the east-west direction. Applying the right-hand thumb rule, we get that the direction of the magnetic field at a point below the wire is from north to south. The direction of the magnetic field at a point directly above the wire is from south to north.
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