Question

State whether True or False :

A relay is an electromagnetically controlled mechanical device in which electrical contacts are opened or closed by a magnetizing current.

• A. True
• B. False

Answer 1

The correct option is A True

The relay / electromagnetic switching devices controls are activated by signals. Most of the time, a small voltage or current is used to switch other voltages or higher currents may be electromechanical or fully electronic type. Relay slow excitation symbol, Relay slow Open contacts, Closed contacts symbol, Closed.A relay is an electromagnetically controlled mechanical device in which electrical contacts are opened or closed by a magnetizing current.