Electromagnetic relays are those relays that work on the principle of electromagnetic attraction and are magnetic switches that use a magnet to generate a magnetic field, which is then used to turn the switch on and off and perform mechanical operations. Electromagnetic relays mainly work on the principle of electromagnetic induction, which also means that when current is passed to a conductor, the conductor acts like a magnet. So when you turn on the power in the low-voltage control circuit, current flows through the coil of the electromagnet, and the coil is activated by the power supply system, creating a magnetic field. On this, the armature creates suction to connect the moving and stationary contacts. The power circuit of the motor switches on and it starts to work.