Question

define resistivity and the resistance ​

Answer 1

${\bf \underline {Answer}}\downarrow$

${\odot}$ ${ \bf {\rm \pink {Define \: Resistivity.}}}$

${\rightarrow}$ The resistance of a conductor having unit length and unit cross-sectional area is called specific resistance or resistivity. In other words it can be said that resistance offered by a conductor in the form of a unit cube between its two opposite faces is called its specific resistance or resistivity.

${ \bf \underline {\rm \purple {Units \: of \: resistivity}}}\rightarrow$ C.G.S unit of resistivity is statohm cm and its S.I unit is ohm-metre.

${\odot}$ ${ \bf {\rm \red {Define \: Resistance.}}}$

${\rightarrow}$ The property of a conductor by virtue of which it obstructs the passage of electric current through it is called resistance of the conductor.

${ \bf \underline {\rm \green {Units \: of \: resistance}}}\rightarrow$ S.I or practical unit of resistance is ohm. In C.G.S system, unit of resistance is statohm (Stat W).

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