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17/07/2021 4:57 pm
Topic starter
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.
1 Answer
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17/07/2021 5:00 pm
(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.