Q: What is an electromagnetic relay?
Answer: Electromagnetic relay is the use of low voltage, weak current circuit on and off, to indirectly control the high voltage and strong current circuit device. An electromagnetic relay is a switch that uses electromagnets to control the working circuit. The structure of the electromagnetic relay is shown in the figure, which is composed of electromagnet, armature, reed and contact, and its working circuit is composed of two parts: low voltage control circuit and high voltage working circuit.