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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for electric power?
π‘ Hint: Think about the relationship between voltage and current.
Question 2
Easy
How is electrical energy calculated?
π‘ Hint: Recall that energy is power multiplied by time.
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 to calculate electric power?
- P = I + V
- P = V Γ I
- P = I / V
π‘ Hint: Think about how power relates to voltage and current.
Question 2
True or False: Electrical energy is measured in joules and kilowatt-hours.
- True
- False
π‘ Hint: Consider how we typically measure energy in households.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a device rated at 1500 W. If it is run for 3 hours, how much energy is consumed in kilowatt-hours?
π‘ Hint: Convert watt-hours to kilowatt-hours at the end.
Question 2
A heating element has a resistance of 20 Ξ© and is connected to a 120 V supply. Calculate the power dissipated and the current flowing through the element.
π‘ Hint: Find current first using resistance, then use that to find power.
Challenge and get performance evaluation