Question 18.AP.3: THREE-WAY LIGHTBULBS Figure 18.11 illustrates how a three-wa...
THREE-WAY LIGHTBULBS
Figure 18.11 illustrates how a three-way lightbulb is constructed to provide three levels of light intensity. The socket of the lamp is equipped with a three-way switch for selecting different light intensities. The bulb contains two filaments. Why are the filaments connected in parallel? Explain how the two filaments are used to provide the three different light intensities.
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