A lightbulb is connected to a 120 V power source, forming a simple series circuit with one load. The lightbulb has a resistance of 240 W and is left switched on for 6 hours.

a) What is the current that flows through the lightbulb? How many electrons pass through the bulb in the 6-hour period?

b) What is the power dissipated in the lightbulb? If a power company charges 8 cents / kW×h for electricity, how much would it cost you to run this bulb for 6 hours?

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