The electrical ressitivities of three materials P Q and
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The electrical ressitivities of three materials P, Q and R are given below:
P→ 2.3×103ΩmQ→ 2.63×10−8ΩmR→ 1.0×1015Ωm
Which material will you use for making (a) electric wires (b) handle for soldering iron, and (c) solar cells?
Give reasons for your choice.
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Right Answer is:
SOLUTION
a) Electrical wires are made from Q as it has the least resistivity
b) Handle for soldering iron is made from an insulator hence, the material used is R
c) Solar sells are made up of semiconductors and they have moderate resistivity so the material used is P