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Question

The north-south polarities of an electromagnet can be found easily by using:


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Solution

Clock face rule:

  1. The clock face rules clearly state whenever an investigator looks somewhere at the face of the coil and notices that the current is flowing anti-clockwise, the countenance of the coil acts as that of the north pole.
  2. When the current flows clockwise, the coils function like the south pole.

The north-south polarities of an electromagnet can be found easily by using the clock face rule.


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