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The Electrical Resistivities of Four Materials P, Q, R and S Are Given Below:Which Material Will You Use for Making: (A) Heating Element of Electric Iron (B) Connecting Wires of Electric Iron (C) Covering of Connecting Wires? Give Reason for Your Choice in Each Case. - CBSE Class 10 - Science

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Question

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

P `6.84xx10^8`Ωm
Q `1.70xx10^8`Ωm  
R ` 1.0xx10^15`Ωm
s  `11.0xx10^-7`Ωm  

Which material will you use for making: (a) heating element of electric iron (b) connecting wires of electric iron (c) covering of connecting wires? Give reason for your choice in each case.

 

Solution

Material S will be used for making the heating element of an electric iron as it has a high resistivity .   

 Material Q will be used for making the connecting wires of an electric iron as it has a low resistivity 

 Material R will be used for making the covering of the connecting wires as it has an extremely high resistivity.

 

  Is there an error in this question or solution?

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Solution The Electrical Resistivities of Four Materials P, Q, R and S Are Given Below:Which Material Will You Use for Making: (A) Heating Element of Electric Iron (B) Connecting Wires of Electric Iron (C) Covering of Connecting Wires? Give Reason for Your Choice in Each Case. Concept: Heating Effect of Electric Current.
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