When you compare 3 lamps in a series circuit to the same 3 lamps in a parallel circuit connected to the same 12-volt battery which statement is TRUE?

Answer 1

If a lamp burns out in parallel circuit, the other two lamps will continue to glow. If a lamp burns out in the series circuit, the other two lamps will also go out. If 3 lamps are in one series circuit, and one of them goes out, the loop is disconnected.

Answer 2

Three lamps in series to a 12 volt battery will each receive 4 volts. Those three lamps in parallel to the same battery will each receive 12 volts. Assuming the resistance of the lamps in both cases is the same (its not, but I'll explain next) the power difference could be a factor of 9 higher in the parallel configuration.

However, the resistance of the lamp is a function of temperature, which is a function of power. Dissipating more power will cause the resistance to rise, so the actual power increase in the parallel case will be somewhat less than 9 times the series case.

AnswerFor a lamp to operate at its rated power, it must be subject to its rated voltage. So, if each of your lamps is rated at 12 V, then the lamps must be connected in parallel in order to operate at their rated brightness.

If each of your lamps is identical then, by connecting them in series, each will be subject to a voltage drop of just 4 V and, so, will not be able to achieve its rated power and will, therefore, be very dim.

On the other hand, if each of your lamps have differentpower ratings then, when connected in series, the voltage-drop across each lamp will not be identical, so each lamp will operate at a different brightness -with the lamp with the lowest power rating being the brightest, which is the opposite to what you might expect. This is because the lamp with the lowest power rating has the highest value of resistance and will, therefore, be subject to the highest voltage drop.

Answer 3

In a series circuit, the voltage is divided among the lamps, so each lamp will receive less voltage compared to lamps in a parallel circuit where each receives the full voltage. Thus, the lamps in a parallel circuit will be brighter and have an equal performance than those in a series circuit.

Answer 4

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