Question

Resistivity is usually expressed in terms of

(A) mho

(B) ohm / oC

(C) ohms/cm-square

(D) ohms/cm-cube.

Answer 1

Answer:

ohm metre

Explanation:

this is the right ans pls make ur options correct.

Answer 2

The resistivity is expressed in terms of ohms- meters.

Explanation:

The relation between resistance and the resistivity of a material is given by :

$R=\rho\dfrac{L}{A}$

Where

R is the resistance

$\rho$ is the resistivity of material

L is the length of the wire

A is the area of cross section of a wire

On rearranging the above formula, we get :

$\rho=\dfrac{RA}{L}$

Putting all the SI units in above formula we get :

$\rho=\Omega \dfrac{m^2}{m}$

$\rho=\Omega-m$

So, the resistivity is expressed in terms of ohms- meters. Hence, this is the required solution.

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