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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define electric power.
💡 Hint: Think about how electricity is utilized in devices.
Question 2
Easy
What is the SI unit of power?
💡 Hint: What do we call one joule per second?
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 formula is used to calculate electric power?
- P = VI
- P = I²R
- Both A and B
💡 Hint: Think about the relationships described in this chapter.
Question 2
True or False: A kilowatt-hour is a measure of power.
- True
- False
💡 Hint: Recall the definitions of power and energy.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A 1500 W heater runs for 10 hours. How much energy (in kWh) does it consume, and what would be the cost at $0.15 per kWh?
💡 Hint: Convert the energy to kWh for cost calculation.
Question 2
If a device operates at 200 V and draws a current of 2 A, find its power consumption, and determine how much energy it uses in 5 hours.
💡 Hint: Use the formulas provided to calculate power first, then energy.
Challenge and get performance evaluation