Which of the following statement about the electromagnet shown above is correct?
- when the current flows from A to B, the end A will be in north pole
-
when the current flows from A to B, the end A will be south pole
- when the current flows from A to B, the end B will be south pole
- none of the above
The correct answer is: B
Explanation
A - B = S - N.
Also, starting end of the current is south while terminating end is North.
There is an explanation video available .