Question

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

(a) Fleming's right-hand rule (b) Fleming's left-hand rule

(c) Clock face rule (d) Left-hand thumb rule

Answer 1

(c) is the correct answer

Polarity is given by Clock face rule. According to it, if current is clockwise it has south Pole and if current is anticlockwise, it has north pole. Now using this rule we can find the Polarity of both the faces.