Question

Solve it. (100 points)
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Answer 1

Resistivity is the resistance of a unit length and of a unit cross sectional area ;

Resistance depends on - LENGTH , CROSS SECTIONAL AREA , TEMPERATURE , NATURE OF A MATERIAL

WE KNOW THAT ;

R ∝ L ( WHERE (R) IS RESISTANCE AND( L) IS LENGTH )

R ∝ 1/A ( WHERE A IS AREA )

COMBINING THE ABOVE EQUATIONS ;

R ∝ L/A

=> R = RHO L/A

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Answer 2

On what factor resistance of a conductor depends?

(a) The resistance of a conductor depends on thickness (cross sectional area of the wire), length and temperature. Resistivity is defined as the measure of the resisting power of a specified material to the flow of an electric current.