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Solved: The wattage marked on a lightbulb is not an

Chapter 15, Problem 43TAS

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QUESTION:

The wattage marked on a lightbulb is not an inherent property of the bulb but depends on the voltage to which it is connected, usually 110 V or 120 V. How many amperes flow through a 60-W bulb connected in a 120-V circuit?

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QUESTION:

The wattage marked on a lightbulb is not an inherent property of the bulb but depends on the voltage to which it is connected, usually 110 V or 120 V. How many amperes flow through a 60-W bulb connected in a 120-V circuit?

ANSWER:

Step 1 of 2

For electric power is given by,

where  is power,  is current and  is voltage.

Implies,

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