Question

Which description best explains a motor's working principle?

A.
an electric coil sits within a semiconductor and then receives exposure to a strong magnetic field
B.
a junction diode sits between the poles of a strong electromagnet, which generates torque
C.
a transistor receives voltage at one terminal, which causes current to flow
D.
a loop of wire carrying a current sits between the poles of a magnet, causing rotational motion

Answer 1

Should be D.

DC or direct current motor has a wound rotor, supplied with current through brushes (unless it is electronic commutated)