Resistance of a uniform metal wire of length 1 m and cross-sectional area 1 cm² is 10 Ω. Resistivity of the wire is

Question

PYQPulse · Accepted Answer

1/10 Ω cm

PYQPulse · Answer

Explanation: Official WBPSC key (Series A): (A) 1/10 Ω cm. Resistivity ρ = R·A/l = 10 × 10⁻⁴/1 = 10⁻³ Ω·m = 0.1 Ω·cm = 1/10 Ω·cm.

Answer: A. 1/10 Ω cm