1. In series, the bulb with the smallest wattage burns the brightest.
2. In a series circuit, there is only one path for current to follow. In a parallel circuit, there are multiple paths for current to follow.
|Step(s) to Follow||Expected Result|
1. Turn switches in both sockets to the OFF position.
2. Wire lamps in series.
3. Connect series circuit to AC switch
4. Turn on small lamp.
|Lamp will not turn on since there is a break in the circuit|
1. Turn small lamp off.
2. Turn large lamp on.
|Lamp still will not turn on since there is a break in the circuit.|
1. Turn both lamps on.
2. (optional) Use a voltmeter to show how potential drop is distributed across the bulbs.
|Small lamp lights brighter than large lamp.|
|1. Connect bulbs in parallel and repeat the above steps.||If one bulb is turned off, the other is unaffected. Additionally, their brightness will correspond to their wattage|
The lecturer may choose to vary this demonstration by adding additional bulbs of similar or different wattage to fit the specific needs of their lesson.