The resistivity of a material is found to be $10^8 \Omega \cdot m$. Then the material would be

What is the resistance of a wire of length $5 \, m$ and resistivity $1.7 \times 10^{-8} \, \Omega \cdot m$,given the cross-sectional area is a hollow cylinder with outer radius $r_2 = 10 \, cm$ and thickness $5 \, mm$?

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

The resistance of a wire is $R$. If the length of the wire is doubled by stretching,then the new resistance will be

By increasing the temperature,the specific resistance (resistivity) of a conductor and a semiconductor,respectively,is:

The resistance of a platinum wire at $0^{\circ}C$ is $2\,\Omega$ and $6.8\,\Omega$ at $80^{\circ}C$. The temperature coefficient of resistance of the wire is: