GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It has high resistance
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It has high melting point
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For all of the above reasons
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It can resist a current upto approx 5 amperes
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Detailed explanation-1: -It offers a very large resistance. It has a high melting point such that it can be heated till red hot without melting. Even at high temperatures, it does not get oxidized easily.
Detailed explanation-2: -Because of its low cost of manufacture, strength, ductility, resistance to oxidation, stability at high temperatures, and resistance to the flow of electrons, nichrome is widely used in electric heating elements in applications such as hair dryers and heat guns.
Detailed explanation-3: -Nichrome is used for making heating element of electrical appliances. Because nichrome does not oxidize and burn easily at high temperature i.e.it has higher melting and boiling point than metals. Thus it does not melt even when a large amount of heat is produced due to passage of current.
Detailed explanation-4: -Nichrome is an alloy of nickel, chromium, manganese and iron having a resistivity of about 60 times more than that of copper. It is used for making the heating elements of electrical heating appliances like electric iron.