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Question
Which of the following materials is used for the heating element of an electric heater?
Which of the following materials is used for the heating element of an electric heater?
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Solution
The correct option is D Nichrome
Electric heater uses Nichrome (80% nickel, 20% chromium) as its heating element. Nichrome is an ideal material, because it offers high hindrance to flow of electric current which results in large amount of heat generation. Also, melting point of nichrome is very high and heating element should be made up of a material which do not melt at high temperatures.
Whereas copper, aluminium, and lead are not used as heating element since they have low melting point.
Electric heater uses Nichrome (80% nickel, 20% chromium) as its heating element. Nichrome is an ideal material, because it offers high hindrance to flow of electric current which results in large amount of heat generation. Also, melting point of nichrome is very high and heating element should be made up of a material which do not melt at high temperatures.
Whereas copper, aluminium, and lead are not used as heating element since they have low melting point.
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