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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is resistivity?
💡 Hint: Think about what happens to electricity in different materials.
Question 2
Easy
Why do metals like copper have low resistivity?
💡 Hint: Consider the structure of metals.
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 does resistivity measure?
- The temperature of a material
- The concentration of electric charges
- The opposition to electric current flow
💡 Hint: Think about how different materials interact with electricity.
Question 2
True or False: Higher resistivity means better conductivity.
- True
- False
💡 Hint: Consider what happens with insulators versus conductors.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
If a material behaves like an insulator with a resistivity of 1 × 10^7 ohm-m, how might its resistivity change if the temperature increases significantly? Provide reasoning.
💡 Hint: Consider the relationship between particle movement and conductivity.
Question 2
A 15-meter long wire has a cross-sectional area of 3 mm² and a resistivity of 5 x 10^-8 ohm-m. Calculate the resistance and discuss how altering the length or area would affect it.
💡 Hint: Rely on the resistance formula for calculations while recalling how dimensions influence resistance.
Challenge and get performance evaluation