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(II) You buy a 75-W lightbulb in Europe, where electricity
Chapter 16, Problem 32P(choose chapter or problem)
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]
Questions & Answers
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: