1.5 - Power and Energy in Electricity
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Practice Questions
Test your understanding with targeted questions
What is the formula for electric power?
💡 Hint: Think about the relationship between voltage and current.
How is electrical energy calculated?
💡 Hint: Recall that energy is power multiplied by time.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the formula to calculate electric power?
💡 Hint: Think about how power relates to voltage and current.
True or False: Electrical energy is measured in joules and kilowatt-hours.
💡 Hint: Consider how we typically measure energy in households.
1 more question available
Challenge Problems
Push your limits with advanced challenges
You have a device rated at 1500 W. If it is run for 3 hours, how much energy is consumed in kilowatt-hours?
💡 Hint: Convert watt-hours to kilowatt-hours at the end.
A heating element has a resistance of 20 Ω and is connected to a 120 V supply. Calculate the power dissipated and the current flowing through the element.
💡 Hint: Find current first using resistance, then use that to find power.
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