Subject :NSO Class : Class 7
In which diagram(s) is/are the correct poles of the electromagnet indicated? (N indicates North pole and S indicates south pole.)
A2 only
B1 and 2 only
C2 and 3 only
D1, 2 and 3
Ans 1:
Class : Class 7
Isn't diagram 2 and 3 the same?
Ans 2:
Class : Class 7
Kindly explain the answer clearly