Question

The electrical resistivities of three materials P, Q and R are given below:

P 2.3 x 103 Ωm

Q 2.63 x 10-8 Ωm

R 1.0 x 1015 Ωm

Which material will you use for making (a) electric wires (b) handle for soldering iron, and (c) solar cells

? Give reasons for your choices.​

Answer 1

answer a) Material Q with resistivity 2.63 X 10-8 ohm-m can be used for making electric wires because it has very low resistivity. (b) Material R with resistivity 1.0 X 1015 ohm-m can be used for making handle of soldering iron because it has very high resistivity. (c) Material P with resistivity 2.3 X 103 ohm-m can be used for making solar cell because it is a semiconductor