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Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does the Joule heating effect refer to?
π‘ Hint: Think about how a toaster works.
Question 2
Easy
Name one appliance that uses an electric motor.
π‘ Hint: Consider common household devices that move or mix.
Practice 4 more questions and get performance evaluation
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What principle explains how electric motors work?
π‘ Hint: Look for the physics concept that involves magnets.
Question 2
True or False: All household appliances consume the same amount of energy.
π‘ Hint: Think about how varying features affect energy use.
Solve 3 more questions and get performance evaluation
Push your limits with challenges.
Question 1
Design a new energy-efficient kettle. What features would you incorporate to reduce energy consumption, and what physics principles would support your design?
π‘ Hint: Think about materials that retain heat effectively.
Question 2
A refrigerator uses 400 kWh of energy per year. How much money would it cost if your electricity rate is $0.12 per kWh?
π‘ Hint: Calculate total expenses by simply multiplying the usage by the cost per unit.
Challenge and get performance evaluation