1.

Why does the cord of an electric oven not glow while its heating elementdoes ?Although coal and petroleum are produced by the degradation of biomass,yet we need to conserve these resources. Why?

Answer»

1.An electric heater works on the principle of the heating effect of electric current. The heating element of the heater blocks the electric current and does not let it pass. So the heating element gets heated and glows due the heat. It has high resistivity , so it does not melt. The cord of the electric heater is a good conductor of electricity so it does not get heated up and also does not glow.

2.Yes it is true that coal and petroleum are produced by the degradation of biomass but we need to conserve them because it takes millions of years for this biomass to get converted into coal and petroleum . If we use these resources unnecessarily and wasting them then our next generations will not be able to use these resources moment of time these resources might be getting formed and thus will not be available to our next generation



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