Question

In the given diagram, if the arrow shows the direction of the electric current, which part of the coil will act as the north pole?

• A. The left end
• B. The right end
• C. The centre
• D. (a) and (b) above.

Answer 1

The correct option is B The right end

Using the right-hand thumb rule at the leftmost end of the solenoid, we see that our fingers would curl inward, thus showing that the magnetic field lines run from the left end to the right end, and we know the magnetic field lines run from the south to the north pole inside a bar magnet. So, the left end of the coil behaves as the south pole, while the right one behaves as the north pole.