Question

The electrical resistivities of three materials P, Q and R given below P
2.3 × 103 Ω m
Q
2.63 × 10−8 Ω m
R
1.0 × 1015 Ω
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:

• for eclectric wires Q should be used bcz it is least resistive and hence there will be little loss of energy.
• for handle of soldering iron material R should be used as it will not let the electric current to pass through it bcz of high resistance
• for solar cells material P can be used so that it can store as well as transfer electric current equally.

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