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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does a resistor do?
💡 Hint: Think about its role in electric circuits.
Question 2
Easy
Calculate the resistance of a 1 m copper wire with a cross-sectional area of 1 mm².
💡 Hint: You will need to find the resistivity of copper.
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 resistance?
- R = V/I
- R = ρ·L/A
- R = V×I
💡 Hint: Remember the relationship involving material properties.
Question 2
True or False: Increasing the temperature of a resistor will decrease its resistance.
- True
- False
💡 Hint: Think about atomic vibrations.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a copper wire of 1 mm² cross-sectional area and 10 m length. Calculate its resistance at 25°C. Then, calculate what its resistance would be at 75°C, giving α = 0.004/°C.
💡 Hint: Consider calculating resistance at both conditions step by step.
Question 2
A 120Ω resistor is connected in series with a 240Ω resistor to a 12V battery. Calculate the total current flowing through the circuit.
💡 Hint: Remember to sum the resistance before applying Ohm's Law.
Challenge and get performance evaluation