Question: Consider the circuit shown in FIGURE 21-56, in which three lights, each with a resistance R, are connected in series. The circuit also contains an

Consider the circuit shown in FIGURE 21-56, in which three lights, each with a resistance R, are connected in series. The circuit also contains an open switch.

Figure 21-56,

(a) When the switch is closed, does the intensity of light 2 increase, decrease, or stay the same? Explain.
(b) Do the intensities of lights 1 and 3 increase, decrease, or stay the same when the switch is closed? Explain.

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