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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define work in the context of electric circuits.
💡 Hint: Think about the movement of charge.
Question 2
Easy
What is the unit of power?
💡 Hint: Recall what a Watt represents.
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 formula for calculating power in terms of work and time?
- P = W × t
- P = W/t
- P = t/W
💡 Hint: Consider how we break down work over time.
Question 2
True or False: Energy can be created or destroyed according to the law of conservation of energy.
- True
- False
💡 Hint: Reflect on the general law of conservation.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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!
Question 2
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!
Challenge and get performance evaluation