- A doorbell is a kind of electric device
- Closing an electric circuit causes an electrical device to function
- Hence, an electric circuit causes a doorbell to function

- An electric circuit causes a doorbell to function
- A doorbell converts electrical energy into sound energy
- Hence, an electric circuit causes the doorbell to convert the electrical energy into sound energy

Hence, an electric circuit causes the doorbell to convert the electrical energy into sound energy
[Question]The primary function of a doorbell circuit is to convert electrical energy into
[Context]- A doorbell is a kind of electric device 
- Closing an electric circuit causes an electrical device to function 
- A doorbell converts electrical energy into sound energy