How much power does a hair dryer use if it draws 15 A of current at 100 V?

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Prepare for the Abeka Science Matter and Energy Test 7. Utilize flashcards and multiple choice questions with detailed explanations to boost your comprehension and succeed in your exam!

Multiple Choice

How much power does a hair dryer use if it draws 15 A of current at 100 V?

Explanation:
Power in an electrical circuit is found by multiplying the voltage by the current (P = V × I). If a hair dryer operates at 100 volts and draws 15 amperes, its power is 100 × 15 = 1500 watts. So the correct amount is 1500 W (about 1.5 kilowatts). The other numbers don’t fit because they would require different combinations of voltage and current than 100 V and 15 A. Real-world hair dryers around 1.5 kW match this calculation.

Power in an electrical circuit is found by multiplying the voltage by the current (P = V × I). If a hair dryer operates at 100 volts and draws 15 amperes, its power is 100 × 15 = 1500 watts. So the correct amount is 1500 W (about 1.5 kilowatts). The other numbers don’t fit because they would require different combinations of voltage and current than 100 V and 15 A. Real-world hair dryers around 1.5 kW match this calculation.

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