11.8 - Electric Power
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Practice Questions
Test your understanding with targeted questions
Define electric power.
💡 Hint: Think about how electricity is utilized in devices.
What is the SI unit of power?
💡 Hint: What do we call one joule per second?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What formula is used to calculate electric power?
💡 Hint: Think about the relationships described in this chapter.
True or False: A kilowatt-hour is a measure of power.
💡 Hint: Recall the definitions of power and energy.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A 1500 W heater runs for 10 hours. How much energy (in kWh) does it consume, and what would be the cost at $0.15 per kWh?
💡 Hint: Convert the energy to kWh for cost calculation.
If a device operates at 200 V and draws a current of 2 A, find its power consumption, and determine how much energy it uses in 5 hours.
💡 Hint: Use the formulas provided to calculate power first, then energy.
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