Question

The unit of specific resistance is

• A. Ohm/cm²
• B. Ohm/cm
• C. Ohm-cm
• D. (Ohm-cm)^–1

Answer 1

The correct option is C

Ohm-cm

The explanation for the correct answer:-

Option (C)

1. The specific resistance of a material is a measure of the resistance, that it offers to the flow of current through it.
2. From the specific resistance formula, $\rho =\frac{R\times A}{L}$=$\frac{(Ohmxc{m}^2)}{cm}$=$Ohm\times cm$
3. Resistivity is ρ when resistance R is expressed in Ohm (Ω) and distances are expressed in centimeters (cm).
4. In this convention, the unit of resistivity is Ohm-cm (Ω.cm).

Hence option C is the correct answer.