You can investigate voltage across cells and lamps in a series and parallel circuit by connecting the following circuits. Put one voltmeter in position V 1 and record the reading in a suitable table.

What do series and parallel circuits have to do with Christmas lights ... To measure voltage, you'd just need a tool known as a voltmeter. Pretty creative, I know. Now, you want a way to measure ...

And a voltmeter measures the potential difference ... in parallel reduces electrical resistance. Learn more about parallel circuits. A three-lane motorway represents three resistors in parallel.