With some strings of Christmas tree lights, if one bulb burns out?

The entire string of lights is no longer illuminated. This is because:


A. the string of lights is a parallel circuit and one burned out bulb breaks the circuit


B. all of the bulbs have burned out


C. the string of lights is a series circuit and one burned out bulb breaks out the circuit

With some strings of Christmas tree lights, if one bulb burns out?
The answer is C, however this doesn't happen in reality because the bulbs are designed to go "short circuit" when they blow thus keeping the others lit.
Reply:C. the string of lights is a series circuit and one burned out bulb breaks out the circuit
Reply:C. When you have a system in a series, the circuit is directly added





-----/\/\/---/\/\/----/\/\/----





Therefore, when one of the lights burn out, the circuit is discontinous





---- -----/\/\/--/\/\/---





No charge can move.





However, when they're in parallel,





....l---/\/\/---l


----l---/\/\/---l-----


....l---/\/\/---l


A burnt out light does not kill the circuit.

garland flower