Practice - Energy (W)
Practice Questions
Test your understanding with targeted questions
Calculate the energy consumed by a device using 10 Watts for 1 hour.
💡 Hint: Remember 1 hour = 3600 seconds.
What is the energy consumed by a 50 W appliance running for 2 hours?
💡 Hint: Convert hours to seconds.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the relationship between energy, power and time?
💡 Hint: Think back to the formula W = P × t.
Energy is measured in which unit?
💡 Hint: Recall that energy is work done over time.
1 more question available
Challenge Problems
Push your limits with advanced challenges
If an appliance uses 75 W for 5 hours and another 30 W for 12 hours, what is the total energy consumption?
💡 Hint: Calculate each energy use separately before adding them up.
An electric kettle uses 1500 W to boil water and takes 10 minutes. If you boil water in 3 different kettles, what is the total energy consumed?
💡 Hint: Compute for one kettle first, then multiply by 3.
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Reference links
Supplementary resources to enhance your learning experience.