Two lamps connected in series with ... same throughout a circuit and voltages add up to the supply voltage. Components that are connected on separate loops are connected in parallel.

It's pretty difficult to find that one bulb that's causing the problem. However, this is a great time to look at the difference between series and parallel circuits. A Simple Circuit Just about ...

For example, 20 A is a bigger current ... To measure the current flowing through a component in a circuit, you must connect the ammeter in series with it. Figure caption, A circuit with an ammeter ...