Question
The electrical resistivities of four materials $A , B , C$ and D are given below :
$
\begin{array}{l}
\text { A : } 110 \times 10^{-8} \Omega m \\
\text { B }: 1.0 \times 10^{10} \Omega m \\
\text { C }: 10.0 \times 10^{-8} \Omega m \\
\text { D }: 2.3 \times 10^3 \Omega m
\end{array}
$
Which material is a (a) good conductor (b) resistor (c) insulator (d) semi-conductor ?
$
\begin{array}{l}
\text { A : } 110 \times 10^{-8} \Omega m \\
\text { B }: 1.0 \times 10^{10} \Omega m \\
\text { C }: 10.0 \times 10^{-8} \Omega m \\
\text { D }: 2.3 \times 10^3 \Omega m
\end{array}
$
Which material is a (a) good conductor (b) resistor (c) insulator (d) semi-conductor ?