If all you have is a 120-V line, would it be possible to light several 6-V lamps without burning them out? How?
This question is about series and parallel connections. Here, you must connect 20 of the bulbs in series to make it work.
When we connect a number of devices in series across a voltage source, the voltage is divided among those devices, in a proportion that is based on the resistance of each device.
As an example, suppose we have two resistances,
The same current then passes through the
In this way, the two series resistors have divided the source voltage, with the larger resistance causing the greatest voltage drop.
Now, if you must use a