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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula to calculate energy consumption in kWh?
💡 Hint: Remember that you need both power and time.
Question 2
Easy
Convert 500 W to kW.
💡 Hint: Divide watts by 1000 to convert to kilowatts.
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 does kWh stand for?
💡 Hint: Think about how electricity consumption is calculated.
Question 2
If a device uses 1000 W for 2 hours, what is its energy consumption in kWh?
- 2 kWh
- 1 kWh
- 0.5 kWh
💡 Hint: Convert power to kilowatts before calculating.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A coffee machine consumes 1200 W and operates for 4 hours each day. Calculate the annual energy cost if the electricity tariff is $0.10 per kWh.
💡 Hint: Calculate daily consumption, then multiply by days in a year, and finally by tariff.
Question 2
You have three devices: 200 W for 10 hours, 300 W for 5 hours, and 600 W for 2 hours. Calculate the total kWh consumed in a month.
💡 Hint: Calculate each device's monthly consumption and sum them together.
Challenge and get performance evaluation