Aswitch is used to start the flow of current in an electrical circuit, and electricity flows when a circuit is complete. Given these facts, what is a purpose of a switch in an electrical circuit among the following options:
- to reduce magnetic effects
 - heat production
 - to annihilate electrons
 - preventing heat transfer
 - direct energy
 - to complete the circuit
 - heat is produced
 - to circumvent resistors


 

      to complete the circuit   