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Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Calculate the energy consumed by a 100 W light bulb used for 2 hours.
💡 Hint: Convert hours to seconds.
Question 2
Easy
How many joules are in one kilowatt-hour?
💡 Hint: Remember the conversion factor.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the formula for calculating electrical energy?
- E = Pt
- E = VIt
- E = IRt
💡 Hint: Think about how power and time relate to energy usage.
Question 2
Is the joule the SI unit of energy?
- True
- False
💡 Hint: Recall your lessons on SI units.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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.
Question 2
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.
Challenge and get performance evaluation