Physics-Resistance & Resistivity
NEET Physics Resistance & Resistivity MCQ Question
Type: MCQ-numerical-Hard-Class 12
A copper wire has a length of 10 m and cross-sectional area of 1.0 × 10^-6 m². If the resistivity of copper at a given temperature is 1.7 × 10^-8 Ωm, what is the resistance of the wire?
A
0.17 Ω
B
7 Ω
C
0.017 Ω
D
70 Ω
Correct Answer
Option A
Detailed Explanation
Resistance is calculated using the formula R = ρL/A. Substituting the given values: R = (1.7 × 10^-8 Ωm)(10 m) / (1.0 × 10^-6 m²) = 0.17 Ω.
Found an issue with this question?