RELAY

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 WORKING OF RELAY

  • Relay works on the principle of electromagnetic induction.
  • When the electromagnet is applied with some current, it induces a magnetic field around it.
  • Above image shows working of the relay. A switch is used to apply DC current to the load.
  • In the relay, Copper coil and the iron core acts as electromagnet.
  • When the coil is applied with DC current, it starts attracting the contact as shown. 
  • This is called energizing of relay.
  • When the supply is removed it retrieves back to the original position. 
  • This is called De energizing of relay

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