Question

Define Resistance and Resistivity.

# $ûjît ❤️​

Answer 1

The measure of a material's ability to oppose the flow of electric current through it is called resistance and it is denoted by R.

Resistivity is defined as the resistance of a material of unit length and unit cross section area. It is denoted by ρ. It is a fundamental property of a material and tells how strongly the material is opposing the current.

The resistance is related to resistivity by the relation,

R

$R = p \frac{l}{a}$

The resistivity of a material depends on temperature. It increases with the increase in temperature and decreases with the decrease in temperature.

Thus, the resistance of a material also increases or decreases with the increase and decrease in temperature.

Answer 2

Answer:

Resistance is defined as the property of the conductor which opposes the flow of electric current. ...

Resistivity is defined as the resistance offered by the material per unit length for unit cross-section. The SI unit of resistivity is Ohm.

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