Question: An AC source with a frequency of 60 Hz is connected to a lightbulb. The instantaneous brightness of the lightbulb depends on the magnitude of

An AC source with a frequency of 60 Hz is connected to a lightbulb. The instantaneous brightness of the lightbulb depends on the magnitude of the instantaneous current. Explain why the brightness of a bulb can flicker (i.e., oscillate with time) and find the frequency of the flicker. Why don’t we notice the flicker?

Figure 21.4

Voltmeter +/- S Wire A loop

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