Question

Imagine a string of holiday lights, with many bulbs connected to each other by wires. One bulb burns out, causing the bulbs next on the string not to work either. What type of circuit must the holiday lights be using?
A. parallel.
B. resistor.
C. series.
D. fuse.

Answer 1

C. Series

Consider resistors in a circuit - if all the resistors in the circuit are in series and one of the resistors fails then no current can flow thru the circuit,

If the resistors are in parallel then then each resistor experiences the same voltage drop regardless of whether or not any resistor in particular is carrying current.