NEET Physics Resistance & Resistivity MCQ Question
A silver wire has a resistance of 2.1 Ω at 27.5 °C and a resistance of 2.7 Ω at 100 °C. What is the temperature coefficient of resistivity of silver?
1.70 × 10^-3 °C^-1
1.70 × 10^-4 °C^-1
1.70 × 10^-2 °C^-1
1.70 × 10^-5 °C^-1
Correct Answer
Detailed Explanation
Using the formula for temperature coefficient of resistance, α = (R2 - R1) / (R1 * (T2 - T1)), the calculation yields 1.70 × 10^-4 °C^-1.
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