(II) You buy a 75-W lightbulb in Europe, where electricity

Chapter 16, Problem 32P

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QUESTION:

Problem 32P

(II) You buy a 75-W lightbulb in Europe, where electricity is delivered at 240 V. If you use the bulb in the United States at 120 V (assume its resistance does not change), how bright will it be relative to 75-W 120-V bulbs? [Hint. Assume roughly that brightness is proportional to power consumed]

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QUESTION:

Problem 32P

(II) You buy a 75-W lightbulb in Europe, where electricity is delivered at 240 V. If you use the bulb in the United States at 120 V (assume its resistance does not change), how bright will it be relative to 75-W 120-V bulbs? [Hint. Assume roughly that brightness is proportional to power consumed]

ANSWER:

Step-by-step solution

Step 1 of 2

The power rating in Europe is: P = 75 W.

The voltage in Europe is: V = 240 V

The resistance of the bulb is:

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