Question

The specific resistance of a conductor increases with?
(CBSE SIMPLY 2002)
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Answer 1

Answer:

The specific resistance of a conductor material is a fixed property of the material. The specific resistance of a conductor material is the resistance at a specific temperature of a body of unit length and unit cross sectional area made of this material. It is a constant for the material regardless of the shape and size of the body.

Answer 2

Solution:-

The specific resistance (resistivity) of a metallic conductor nearly increases with increasing temperature as shown in figure. This is because, with the increase in temperature the ions of the conductors vibrate with greater amplitude and the collisions between electrons ans ions become more frequent, over a small temperature range (upto 100°C). The resistivity of a metal can be represented appropriately by the equation :

${\huge{\boxed{\mathcal{{ρt=ρo(1+ \alpha t)}}}}}$

The Factor α is called the temperature coefficient of resistivity.

[refer attachment for clear understanding ]