The electrical resistivities of three materials P, Q, and R are given below: P = 2.3×103 Ωm Q = 2.63×10-8 Ωm R = 1.0×1015 Ωm Which material will you use for making? a) Electric wires b) Handle for soldering iron c) Solar cells Give reasons for your choices.
ScienceClass 10ICSEAnswered 27 Mar 2026
Answer
- For making of the electric wires, Q = 63×10-8 Ωm can be used as this material has a very low resistivity
- For making of the handle for soldering iron, R = 0×1015 Ωm can be used as this has a very high resistivity
- For making of the solar cells, P = 3×103 Ωm can be used as this materials is a semiconductor