Question

The north-south polarities of an electromagnet can be determined with the help of

• A. Maxwell's corkscrew rule
• B. right hand thumb rule
• C. clock face rule
• D. Fleming's left-hand rule

Answer 1

The correct option is C clock face rule

Answer is C.
A current carrying loop works like a electromagnet. The polarity of this magnet can be understood with the help of clock face rule. If the current is flowing in anti-clockwise direction, then the face of the loop shows North Pole. On the other hand, if the current is flowing in clockwise direction, then the face of the loop shows South Pole.