Question 13118 of 731 · Texas Journeyman Electrician Exam
A single-phase 240 volt, 10 kW heater operates for 3 hours. How many kilowatt-hours does it use, and what is its current?
Exactly one answer is correct.
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Correct answer to question 13118
- B: 30 kWh, 41.7 A
Explanation
Energy is 10 kW x 3 h = 30 kWh, and current is 10,000 / 240 = 41.7 A. 83.3 A results from dividing by 120 V, and 24.1 A from dividing by 1.732 as well.
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