Important Numericals on Resistivity of Materials

A wire has a resistance of 2.5Omega at 28^(@)C and a resistance of 2.9Omega at 100^(@)C . The temperature coefficient of resistivity of material of the wire is

Assertion : Bending a wire does not effect electrical resistance. Reason : The resistance of wire is proportional to the resistivity of material.

A wire 100cm long and 2.0mm diameter has a resistance of 0.7 ohm , the electrical resistivity of the material is

CBSE Class 12 Chemistry - Most Important Numericals | Physical Chemistry - Part 1| CBSE Boards 2020

On what factors does the resistivity of a material depend ?

Assertion (A): Bending of a conducting wire effects electrical resistance. Reason( R): Resistance of a wire depends on resistivity of that material.

Class 12 Physics Exam | 15 Most Important Numerical For CBSE Boards Physics Exam ?