The circuit has the light bulb. If the circuit has the switch and the switch is on then the circuit is complete. If the circuit does not have the switch then the circuit is complete. If the circuit is complete and the circuit has the light bulb then the light bulb is glowing. If the circuit is complete and the circuit has the bell then the bell is ringing. If the circuit is complete and the circuit has the radio then the radio is playing.
The circuit has the switch.
@0: The circuit has the light bulb.[(triple1)]