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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
If a light bulb uses 60 watts and is on for 5 hours, how many kWh does it consume?
💡 Hint: Use the formula: E_kWh = (P * t) / 1000.
Question 2
Easy
A device consumes 1500 watts for 3 hours. What is the energy used in kWh?
💡 Hint: Remember to convert watts to kilowatt with the formula.
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 unit of electrical energy consumed?
- Joule
- Kilowatt-hour
- Watt
💡 Hint: Think of the unit used for electricity bills.
Question 2
True or False: The total cost of electricity is calculated by dividing kWh used by the cost per kWh.
- True
- False
💡 Hint: Remember the formula for cost calculation.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Calculate the total energy consumption of a washing machine rated at 500 watts operating 2 hours a day for 30 days. What would be the cost of this energy use if the rate is $0.14 per kWh?
💡 Hint: Remember to multiply daily energy use by days in the month.
Question 2
A 1200 watt electric oven is used for 1.5 hours a day. What will its monthly electric cost be if the cost per kWh is $0.18?
💡 Hint: Calculate daily energy and then multiply by the cost.
Challenge and get performance evaluation