STANDARD Physics Temperature Coefficient of Resistance MCQ Question
A wire has a resistance of 2.5 Ω at 28°C and a resistance of 2.9 Ω at 100°C. The temperature coefficient of resistivity of material of the wire is
1.06 × 10⁻³ °C⁻¹
3.5 × 10⁻² °C⁻¹
2.22 × 10⁻³ °C⁻¹
3.95 × 10⁻² °C⁻¹
Correct Answer
Detailed Explanation
Using the formula R₂ = R₁[1 + α(T₂ - T₁)], we find α = 2.22 × 10⁻³ °C⁻¹ by substituting the given resistances and temperatures.
Found an issue with this question?
Related Questions
More from
Consider a conductor of length l and cross-sectional area A. If the conductor is cut lengthwise into two identical slabs, each having a cross-sectiona...
Consider a diagram showing a rectangular slab of length \( l \) and area of cross-section \( A \). If the resistance \( R \) of the slab is given by t...
A platinum resistance thermometer has a wire at the ice point with a resistance of 5 Ω and at the steam point with a resistance of 5.23 Ω. If the resi...