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The front face of a circular wire carrying current behaves like a north pole. The direction of current in this face of circular wire is:(a) clockwise (b) downwards (c) anticlockwise (d) upwards
A current-carrying loop works like an electromagnet. The polarity of this electromagnet can be understood with the help of the Clock face rule.
The clock face rule is used to determine the polarity of two faces of a current-carrying circular coil (solenoid) as well as an electromagnet.
According to this rule, if we look at one face of the circular wire (or coil) through which a current is passing, we have the following conclusions:
1. If the current around the front face of the circular wire (or coil) flows in the Clockwise direction, then this face of the circular wire will be the South pole (S-pole).
And, the flow of current in the back face of the circular wire will be Anticlockwise and acts as a North pole.
2. If the current around the front face of the circular wire (or coil) flows in the Anticlockwise direction, then this face of the circular wire will be the North pole (N-pole).
And, the flow of current in the back face of the circular wire will be Clockwise and acts as a South pole.
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