Question

The length of a conductor is halved, then its conductivity will be:
A.halved
B.doubled
C.quadrupled
D.unchanged

Answer 1

Hint:The intrinsic property of a material is given as the property of material which is independent of how much of a material is there and also it is independent of the form of the material. Density is a common example of this. The density of the material cannot be changed even if the amount of material is varied.
Formula used:
$C = \dfrac{l}{{RA}}$
where $l$ is the length of the conductor.
$R$ is the resistance of the conductor.
$A$ is the Area of the conductor.

Complete answer:
The intrinsic properties are dependent primarily on the fundamental chemical composition and their structure.
First of all, let us talk over the property termed as conductivity. Conductivity is the property of a material which is specified as the amount of how easily an electric charge or heat energy will pass through a material. A conductor is a material which is having very little resistance or in ideal case no resistance at all, to the passing of an electric current or thermal energy. Material has been classified based on this. They are metals, non-metals, and semiconductors. Conductivity is considered to be an intrinsic property of a material. It is reliant only on the nature of substances but not on the dimensions of a conductor. Therefore, the conductivity will be the same even if the length of the conductor is varied.

So, the correct answer is option is D unchanged.

Note:
Common metals we know, like copper and aluminum, are having the highest thermal conductivity. But materials like steel and bronze have the lowest conductivity. Thermal conductivity is a prime property when we fix the metal to be used for certain applications.