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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 used by a 100 W device operating for 1 hour.
💡 Hint: Use W = Pt, where t is 3600 s.
Question 2
Easy
What is the power in watts if 300 joules of energy are consumed in 30 seconds?
💡 Hint: Use P = W/t.
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?
- Joule
- Watt
- Volt
💡 Hint: Remember energy and power have different units.
Question 2
True or False: 1 kWh is equal to 3.6 million joules.
- True
- False
💡 Hint: Consider how kilowatt is defined.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A factory runs a machine that consumes 1500 W for 24 hours. How much energy does it use in kWh?
💡 Hint: Use Energy = Power x Time and convert to kWh.
Question 2
If a car's battery supplies 12 V and the total current drawn is 10 A, what is the electrical power used?
💡 Hint: Apply the formula P = VI.
Challenge and get performance evaluation