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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define resistivity.
💡 Hint: Think about how materials vary in their ability to conduct electricity.
Question 2
Easy
What is the formula for conductivity?
💡 Hint: Remember the relationship between these two concepts.
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 unit of resistivity?
- Ohm
- Ohm-meter
- Siemens
💡 Hint: Consider the dimensions used in resistance.
Question 2
True or False: A material with high resistivity can easily conduct electricity.
- True
- False
💡 Hint: Think about how we classify conductors vs insulators.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
If a conductor has a resistivity of 5.2 × 10⁻⁸ Ω·m and is 2 mm in diameter, what would be its resistance over a length of 50 m?
💡 Hint: Remember to find the area of the circle for the wire's cross-section.
Question 2
A semiconductor at 25°C has a resistivity of 50 Ω·m. If the temperature increases to 75°C and the resistivity drops by 20%, what is the new resistivity?
💡 Hint: Calculate the new value based on the percentage change.
Challenge and get performance evaluation