Practice Temperature Dependence Of Resistivity (3.8)

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8 questions

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6 sample questions

Question 1.
What is the general formula for resistivity in metals as it relates to temperature?
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Remember how \\\\$ a \\\\$ influences resistance.
Question 2.
Define resistivity.
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Think about how it affects current flow.
3Question 3.
What is the effect of temperature on the resistivity of metallic conductors?
- Decreases
- Increases
- Remains the same
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Think about how hot metals behave.
4Question 4.
True or False: The resistivity of semiconductors typically decreases with increasing temperature.
- True
- False
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Consider how heat affects electrons in semiconductors.
Question 5.
A heating element made of nichrome has a resistance of 100 Ω at 20 °C and a temperature coefficient of resistivity of 1.57 x 10^-5 °C^-1. Calculate its resistance at 200 °C.
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Follow the formula while plugging in the values carefully.
Question 6.
Explain why metals are generally used as conductors and their resistivity changes with temperature.
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Think about the atomic structure and flow of electrons in metals.

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