An electromotor is a equipment which converts electrical energy into mechanic energy. It utilizes a electrified coil to generate a rotary magnetic field which works on the rotor and form a magnetoelectric force rotary torque. Electromotors are divided into DC electromotor and AC electromotor according to the difference of power source.
Electromagnetism, one of the physical concept, is the joint name of electric property and magnetic property which objects express. It was discovered by Faraday.
Tools needed: screwdriver, scissors, lighters, etc.