Question

Electric resistivity of three substances a b c are given below a hundred into 10 raise to power minus 6 m b 10 raise to power 13 m c 1.7 into 10 raise to power minus 8 m which of the following substances can do for making cord heating element handle of an electric kettle justify your answer.

Answer 1

The cord of heating element can be done with option (c) because it has less resistivity and acts like a conductor

The heating element can be done with option (a) because it is a nichrome alloy and heating element should be made up of alloy to produce a lot of heat energy

the handle of electric metal can be made using (b) as it has higher resistivity hence providing insulation for hot kettle