Practice - Conclusion
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
Define work in the context of electric circuits.
💡 Hint: Think about the movement of charge.
What is the unit of power?
💡 Hint: Recall what a Watt represents.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the formula for calculating power in terms of work and time?
💡 Hint: Consider how we break down work over time.
True or False: Energy can be created or destroyed according to the law of conservation of energy.
💡 Hint: Reflect on the general law of conservation.
Get performance evaluation
Challenge Problems
Push your limits with advanced challenges
A circuit consumes 300 W for 5 hours. What is the total energy consumed in kilowatt-hours? Calculate the cost if the energy rate is $0.12 per kWh.
💡 Hint: Convert watts to kilowatts before calculating time!
If an appliance rated at 1200 W operates for 30 minutes, how much energy does it consume? What is the power loss if the resistance is 10 ohms?
💡 Hint: Use the relationship between power, current, and voltage, remember V = I · R!
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.