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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for calculating electrical energy?
💡 Hint: Think about the units used for power and time.
Question 2
Easy
If a device uses 500 Watts of power for 2 hours, how much energy does it consume?
💡 Hint: Remember to convert Watts 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 is the energy consumed by a 200 W light bulb running for 5 hours?
💡 Hint: Convert Watts to kilowatts first.
Question 2
True or False: Energy is typically measured in joules in household usage.
- True
- False
💡 Hint: Think about how your electricity bill is presented.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A solar panel generates 300 Watts of power for 6 hours a day for 30 days. Calculate the total energy produced in kWh and if the electricity cost is $0.15 per kWh, how much would the savings be?
💡 Hint: Break it down into parts: calculate energy first before computing savings.
Question 2
If an industrial machine uses 15 kW for 10 hours a day, what is its energy consumption in a month (30 days), and how much would it cost at $0.10 per kWh?
💡 Hint: Remember to multiply power, time, and days to find total energy.
Challenge and get performance evaluation