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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does Joule's law state?
💡 Hint: Remember the formula H = I²Rt.
Question 2
Easy
Name two appliances that utilize the heating effect of electric current.
💡 Hint: Think of appliances that generate heat to perform their function.
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 heat produced in a resistor?
- H = IVt
- H = I²Rt
- H = V/R
💡 Hint: Remember that heat is involved with current and resistance.
Question 2
True or False: Fuses are designed to allow the current to exceed safe limits.
- True
- False
💡 Hint: Think about the safety purpose of a fuse.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
An electric iron has a resistance of 20 Ω and operates at 240 V. Calculate the power consumed.
💡 Hint: Use the power formula that relates voltage and resistance.
Question 2
How much heat is produced when a 3 A current flows through a 6 Ω resistor for 15 seconds?
💡 Hint: Substitute the values into Joule’s law carefully.
Challenge and get performance evaluation