![]() As electricity passes through both Bulbs A and B, the two bulbs share the 2 units of electricity equally. This means that there are 2 units of electricity flowing through the red pathway. In the circuit above, there are two batteries. Note: 1 battery represents 1 unit of electricity. With the above in mind, let us now work out the brightness of the bulbs together. Additionally, the brightness of the bulb corresponds to the amount of electricity it receives. The number of batteries in a circuit determines the amount of electricity flowing through each pathway. Whether the other bulbs in the circuit will still light up when one bulb fuses.There are four points of comparison between the series arrangement and the parallel arrangement of bulbs: Now that we have gained a better understanding of what it means to arrange bulbs in series and in parallel, let us discuss the advantages and disadvantages of these two arrangements. The bulbs in Circuit A are arranged in series while the bulbs in Circuit B are arranged in parallel.Īdvantages and Disadvantages of Arranging Bulbs in Series or Parallel (a) What is the difference between the arrangements of the bulbs in circuits A and B? Thus, the bulbs in Circuit B are arranged in parallel. With these diagrams, it is clear that there is more than one possible pathway that electricity can flow through the bulbs. In the two diagrams above, I have traced in green and yellow the two possible pathways that electricity can flow through from one end of the battery to the other. Thus, the bulbs in Circuit A are arranged in series. We can see that there is only one pathway that electricity can flow through the bulbs in Circuit A. In the diagram above, I have traced in red how electricity flows from one end to the other end of the battery for Circuit A. Therefore, in order to identify the arrangements of bulbs in a circuit correctly, students should identify the number of pathways that electricity is able to flow through in a circuit. When bulbs are arranged in parallel, there is more than one pathway in the circuit that electricity can flow through. When the bulbs in a circuit are arranged in series, there is only one pathway that electricity can flow through. They tend to associate bulbs arranged in series to be bulbs placed next to each other and bulbs in parallel to be one bulb placed on top/below of another bulb, which is inaccurate. However, many students often have misconceptions about the definition of bulbs in “series” and “parallel”. When there are two bulbs in a circuit, they can either be arranged in series or in parallel. ![]() The only difference (other than the number of switches) is the position of the bulbs in the circuit. We can see from the diagrams that both Circuit A and Circuit B have 2 batteries and 2 bulbs each. In addition to understanding that concept, it is also important for students to be able to identify the different arrangements of bulbs in an electrical circuit – series and parallel.Īfter which, they have to understand that arranging the bulbs in a certain arrangement has its advantages and disadvantages. ![]() Previously, we have discussed the arrangement of wires in a light bulb and its effects.
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