Question

correct statement of resistance is a. resistance is inversly proportional to the length of the conductor b. resistance changes with temperature c. resistance is directly proportional to the area of the cross section d. resistance does not depend upon nature of material ​

Answer 1

Answer:

ALL ARE CORRECT SENCTENCES HERE EXCEPT ONE i.e. (d)

Explanation:

Hope it is clear to u

Answer 2

d. resistance does not depend upon nature of material ​

Explanation:

Resistance of a wire is given by the relation:

$R=\rho.\frac{l}{a}$

where:

$l=$ length of wire

$a=$ area of the cross-section of wire.

$\rho=$ specific resistance of the wire material

The resistance of a metallic wire as a function of temperature is given as:

$R=R_{ref}[1+\alpha(T-T_{ref})]$

where:

R = resistance of the wire

$R_{ref}=$resistance at reference temperature

$\alpha=$temperature coefficient of resistance

T = conductor temperate

$T_{ref}=$ reference temperature

Thus the resistance of a conductor depends upon the material.

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TOPIC: resistance , resistivity

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