What is relay? Andavantage of relay

Question

Accepted Answer

A relay is an electrically operated switch that uses an electromagnet to mechanically control the switching action.

Relays are used to control high power or high voltage circuits with a low power signal.
They can be used to switch on or off electrical devices remotely.
Relays provide electrical isolation between the control circuit and the circuit being controlled.
They are commonly used in automotive applications, industrial control systems, and home automation.
Advantages of relays include their ability to handle high currents and voltages, their long lifespan, and their reliability.
Relays can also provide protection against overloads and short circuits.
Examples of relays include electromagnetic relays, solid-state relays, and thermal relays.

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