Which of the following statement about the electromagnet ...
Which of the following statement about the electromagnet shown above is correct?
A.
when the current flows from A to B, the end A will be in north pole
B.
when the current flows from A to B, the end A will be south pole
C.
when the current flows from A to B, the end B will be south pole
D.
none of the above
Correct answer is B
A - B = S - N.
Also, starting end of the current is south while terminating end is North.