Physics

Name and state the rule by which the polarity at the ends of a current carrying solenoid is determined.

Electro-Magnetism

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Answer

Polarity at the ends of a current carrying solenoid is determined by the Clock rule.
It states that looking at the face of the loop, if the current in wire around that face is in anticlockwise direction, the face has the north polarity, while if the current at that face is in clockwise direction, the face has the south polarity.

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