8.11.2 - Electrical Energy
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Practice Questions
Test your understanding with targeted questions
Calculate the energy consumed by a 100 W light bulb used for 2 hours.
💡 Hint: Convert hours to seconds.
How many joules are in one kilowatt-hour?
💡 Hint: Remember the conversion factor.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the formula for calculating electrical energy?
💡 Hint: Think about how power and time relate to energy usage.
Is the joule the SI unit of energy?
💡 Hint: Recall your lessons on SI units.
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Challenge Problems
Push your limits with advanced challenges
A home appliance uses 400 W for 5 hours. Calculate the total energy consumed in kilowatt-hours and joules.
💡 Hint: Don't forget to convert watts to kilowatts.
If a device uses 1500 W and operates for 8 hours daily, what is the monthly energy consumption in kWh?
💡 Hint: Consider the total days in a month and the daily usage.
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Reference links
Supplementary resources to enhance your learning experience.