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Efficiency isn't the question. They just do different things. For example, if you look at a typical lighting circuit in a house, all the bulbs on a circuit are in parallel. They each have the same voltage across the bulbs.

If you rewired this so that the bulbs were in series then the voltage would be divided across each bulb and if one bulb burned out the others in series would get no current and would not light.

If you had two 60Watt bulbs in parallel in your house, each would draw 1/2 Amp. Add another bulb and it would draw 1/2 amp as well, for a total of three 60W bulbs drawing 1.5 amps from the power source. If the same three bulbs were in series there would be 40 Volts across each one with a current of 1/6 amps per bulb. Hence each bulb would be about 1/3 as bright as in the parallel circuit.

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15y ago

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Would you use Series or parallel circuit for Christmas lights?

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How are parallel circuit lights better than series circuit lights using science facts?

In a parallel circuit, there are multiple paths for electricity to flow. So, if one switch is turned off there is still other paths for electricity to flow so the other lights can remain on. However, in a series circuit there is only one path for the electricity to travel. So, if the switch in a series circuit was turned off the electricity would stop flowing causing all the lights to go out.


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Do school buildings have a series circuit or a parallel circuit?

All commercial power distribution is in parallel. If the school building operated on a series circuit, then the classrooms would go dark when the coffeepot in the teachers' lounge was shut off.


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