Question

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

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

Answer 1

The correct option is C

clock rule

The north-south polarities of an electromagnet can be found easily by using clock rule. According to clock rule, the end of the solenoid at which current flows in the clockwise direction will be south pole and the end of the solenoid at which current flows in the anti-clockwise direction will be north pole.