Question

In a circular loop, we can find the polarity of the faces by using

• A. Fleming's left-hand rule
• B. right-hand thumb rule
• C. Ampere's swimming rule
• D. None of these

Answer 1

The correct option is B

right-hand thumb rule

In a circular loop, we can find the polarity of the faces by using right-hand thumb rule. We know that magnetic field due to each part of the wire will have a component in the centre of the loop that points in one direction. The polarity will depend on the direction of the current in the loop.