Practice - Work, Power, and Energy in Practical Applications
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Practice Questions
Test your understanding with targeted questions
What is the relationship between energy consumption and power rating for appliances?
💡 Hint: Consider what happens when you use more powerful appliances.
What does energy efficiency in household appliances mean?
💡 Hint: Think about how LED bulbs use less energy than incandescent bulbs.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is power in the context of electrical energy?
💡 Hint: Remember the definition of power and its relation to work.
True or False: High-voltage transmission increases energy loss in cables.
💡 Hint: Think about the relationship between voltage and current.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
A city uses a 100-mile, 6-inch diameter power line with an average current of 1000 A. Calculate the energy loss if the resistance is 0.1 ohms per mile.
💡 Hint: Use the total resistance to find the energy loss from the current.
If a household replaced all its incandescent bulbs with LED bulbs that use 75% less energy, how would this affect their electricity bill over a year assuming they use them for 5 hours daily?
💡 Hint: Compare the kWh used throughout the year between both types.
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Reference links
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