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3 cards from this section. Quick, good the night before a test.
Define resistivity.
Think about how materials vary in their ability to conduct electricity.
What is the formula for conductivity?
Remember the relationship between these two concepts.
What is the unit of resistivity?
Consider the dimensions used in resistance.
True or False: A material with high resistivity can easily conduct electricity.
Think about how we classify conductors vs insulators.
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?
Remember to find the area of the circle for the wire's cross-section.
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?
Calculate the new value based on the percentage change.
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