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. to conserve the energy in the battery b. so the electromagnet will continuously turn c. to constantly polarize the field magnet d. so the magnetic field will get stronger

Explanation:

In an electric - motor, the continuous flipping of the electromagnet's polarity every 180 degrees allows the electromagnet to be continuously repelled and attracted by the permanent magnet, enabling continuous rotation. This is the fundamental principle for the operation of an electric motor.

Answer:

B. so the electromagnet will continuously turn