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Question
A current through a horizontal power line flows in the east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it?
A current through a horizontal power line flows in the east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it?
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Solution
The current is in the east-west direction. Applying the right-hand thumb rule, we get that the direction of magnetic field at a point below the wire is from north to south. The direction of magnetic field at a point directly above the wire is from south to north.
The current is in the east-west direction. Applying the right-hand thumb rule, we get that the direction of magnetic field at a point below the wire is from north to south. The direction of magnetic field at a point directly above the wire is from south to north.
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