Circuit Diagrams
 

Circuit Diagrams problem 14


A student connects the circuit shown below.




Which switches must be closed for the bell to ring without lighting the lamp.

  • 1 and 2 only

  • 1 and 3 only

  • 1,3 and 4 only

  • 2,3 and 4 only


 

main author and content editor: Noble Menedi Firima