Relay Fundamentals Quiz

Relays are used to control a circuit using a low-power signal, providing electrical isolation and signal amplification.

Relays are different from switches because they are operated electrically, allowing for remote control and automation.

Relays typically use an electromagnet to open or close contacts, enabling them to control other circuits.

Relays were first used in long-distance telegraph circuits as signal repeaters, to amplify and extend signal range.

The text mainly focuses on the types of relays and how they can be utilized in different applications.

The text covers the principles of operation and construction of relays, explaining how they work and are built.

The text addresses safety precautions when working with relays to prevent electrical hazards.