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A burned out light bulb has high resistance - it is open - so, in a series circuit, it will have full supply voltage across it while the other bulbs in the circuit have zero volts. In a parallel circuit, just look and see which bulb is not lit.

If you are talking about Christmas tree lights, however, they are generally designed to short out when they burn out, so that bulb goes dark while the others stay lit, even in a series circuit. The down side of that design is that the remaining bulbs will get brighter and hotter, and they will tend to burn out faster.

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15y ago

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Related Questions

How you can quickly determine whether a string of lights is wired in series or parallel?

Remove a light bulb. If they all go out, it is series, if the all stay on, it is parallel.


If a light bulb is missing in a series circuit will the bulb light?

If one light bulb in a series circuit fails, all the other light bulbs will go out, until the failed bulb is replaced and the series circuit is completed again.If one light bulb in a parallel circuit fails, all the other light bulbs will still work.


Why is most of the wiring in a typical home in parallel?

If the wiring was all in series, then a light bulb could go out, and then everything would go out, but if it is in parallel, the light bulb can go out, and the rest will stay lit.


Which cicuits light the bulb better-Bulbs light better in which kind of circuits?

If you are comparing parallel vs series circuits, light bulbs produce more light in parallel circuits.


What can you do for a fifth grade science fair project?

light bulb circuits like parallel and series circuit


What will happen if the two switches connected to light up a single bulb are on?

It is dependant on whether the switches are in wired in a parallel or series configuration. If the switches are wires in parallel then both switches would have to be off to turn the light bulb off. Either switch could turn the light bulb on. If the switches are wired in series then both switches would have to be on to turn the light bulb on. Either switch could turn the light bulb off.


If one light bulb burns out but other light bulbs stay lit what type of arrangement is this?

That is a parallel circuit. Each bulb is wired directly to the power and not through each other. A Christmas tree light set is an example of a series circuit, and often up to 3 series circuits in parallel. Because the sets are wired in parallel, a missing bulb in one of the series sets only affects that one set, and thus 2/3 of the lights may still work.


What components do you need to make a simple series circuit to light on bulb?

You need a Battery, Light Bulb, Ammeter, Switch.


Why are parallel Christmas lights better than series?

In a series circuit, if any one bulb goes open the rest of the lights will go out. The current flow in a series circuit is common throughout the whole circuit. In a parallel circuit when one bulb goes open the rest remain on due to the configuration of a parallel circuit.


When a circuit of light bulbs is wired in such a way that if one bulb burns out the rest stay lit it is called?

The question is ambiguous, however one possibility is a parallel circuit, which would permit one light bulb to remain lit while the other light bulb was switched off. By contrast, if the light bulbs were connected in a series circuit, switching one light bulb off would cause both lights to go off.


What is the difference between series and parallel Christmas lights?

With series Christmas lights, if one burns out, the whole string stops working. With parallel Christmas lights one light burning out only affects that light. This makes it much easier to replace burned out lights in the case of the parallel lights.


What will happen to the resistance and the brightness if you add a light bulb to the circuit?

If a rheostat is connected in parallel with a light bulb, the setting of the rheostat should have no effect on the performance of the light bulb, as long as the power supply is able to maintain its output voltage and deliver the current demanded by their parallel combination.