Question

However, motors are designed so that the polarity of the electromagnet constantly flips. That is, the north pole becomes the south pole, and the south pole becomes the north pole, every time the electromagnet turns 180 degrees.

Why is it designed this way?
A.
so the electromagnet will continuously turn
B.
so the magnetic field will get stronger
C.
to conserve the energy in the battery
D.
to constantly polarize the field magnet

Answer 1

Step-by-step explanation:

The magnetic field lines of a simple magnet are shown in the picture below. They point from the north pole to the south pole. However, the magnetic field lines do not just end at the tip of the magnet. They go right through it, so that inside the magnet the magnetic field points from the south pole to the north pole.