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Class 12 Physics Practice Test: Temperature Dependence of Resistivity
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Class 12 Physics Practice Test: Temperature Dependence of Resistivity
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10 Questions

1. Which of the following is not a valid reason for using alloys to make standard resistors?
2. Which of the following relation is significant for metals when the temperature increases?
3. The resistivity of semiconductors and insulators decreases linearly with the increase of temperature.
4. A wire has a resistance of 5.5 Ω at 19oC and 21.5 Ω at 200oC. Find the temperature coefficient of resistivity(α) of the material.
5. Identify the material which is suitable for making standard resistors.
6. Which among the following has weak temperature dependence values with resistivity?
7. Identify the temperature at which the resistance of copper would be double of its resistance at oC. Given α (temperature coefficient of resistivity) for copper=3.9 x 10-3 oC-1.
8. What is the unit of the temperature coefficient of resistance (α)?
9. The resistivity of ‘X’ decreases with temperature and its coefficient of resistivity is negative. Identify X.
10. Identify the type of material based on the T-ρ graph given below.

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