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A light bulb is connected to a 240-V wall socket. The
current in the bulb depends on the time t according
to the relation I = (0.707 A) sin[(125.6 Hz)t]. (a) What is
the frequency of the alternating current? Hz (b)
Determine the resistance of the bulb's filament? O (c)
What is the average power delivered to the light
bulb? W

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