Physics Current Electricity PMDC 2021
PMDC Verified Question 75 of 112
Conductivity depends on
A
Temperature and nature of material
B
Length
C
Area
D
All
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Temperature and nature of material
Concept:

Conductivity (\(\sigma\)) and resistivity (\(\rho\)) are intrinsic material properties. They do not depend on physical dimensions like length or area.

Solution:

  • Unlike "Resistance" or "Conductance", Conductivity is an inherent property.


  • It depends solely on the internal atomic structure (nature of the material) and the thermal kinetic energy of the atoms (temperature).


Why other options are incorrect:

  • Opt B & C: Length and Area dictate the total Resistance, not the intrinsic Conductivity.


  • Opt D: Because B and C are wrong, "All" is incorrect.

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