Why are alloys commonly used in electrical heating devices give two reasons?

Most electrical heating devices use alloys because they have high resistivity and the melting point is also high in them.

Why alloys are commonly used in electrical heating devices give 2 reasons?

As we know alloys have high resistivity and high melting point as compared to pure metals. So alloys cannot easily burn or oxidize at higher temperature. Now as we want higher temperature in heating devices so we use alloys in heating devices.

Why are alloys commonly used in electrical devices give reason?

Alloys are used instead of the pure metals in the electrical heating devices because they have the less electrical conductivity with the less melting point. The Alloys does not have any single melting point instead of that they have numerous melting point. So that’s why the alloys are used in the electrical appliances.

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Why nichrome an alloy is commonly used in electrical heating devices?

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.

Why are heating elements made of alloys?

Answer: alloys have high melting point than pure metals. hence heating elements are made of alloy rather than the pure metals. alloys are more resistant to corrosion than pure metals.

Why are alloys used in heating devices like electric iron toasters immersion rods etc?

Answer:Alloys have higher resistivity than that of its constituent metals. so they are used for the heating devices like Electric Iron and Geysers.

Why do alloys have high resistivity?

Free electrons are scattered off imperfections and alloys have many more of them than pure metals. The higher resistivity in alloys as compared to the constituents is caused by an additional scattering mechanism of the electrons called “alloy scattering”.

Why alloys do not oxidise readily at high temperatures?

Answer: Alloys are used for making the coils in electric toaster and electric iron because alloys have higher melting point than pure metals. So, the coils made from alloys do not melt or get deformed and alloys do not get oxidized or burn readily at high temperatures.

Which material would you suggest to be used in electric heating devices give reason for your choice?

Nichrome is the best material for heating elements. It is because the resistivity of the nichrome is more than the resistivities of the metals used to make it and it does not oxidise at higher temperature.

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What alloy is often used in heating elements?

Nichrome: Most resistance wire heating elements usually use nichrome 80/20 (80% Nickel, 20% Chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.

Why is nichrome wire generally used as heating element in heating appliances give any two reasons?

In most of the household heating appliances, nichrome element is used because of the following reasons: (i) Its melting point is high. (ii) Its resistivity is large. (iii) It can be easily drawn into thin wires (i.e., it’s ductile).

Why filament of nichrome is used in electric heater write any two reasons?

Answer: Nichrome wire is used as a heating element because it is very stable, even at high temperatures. Unlike other metals, it will not melt even when generating large amounts of heat. … When electrons encounter resistance while trying to flow through a substance, energy is lost through heat.

Why does nichrome wire heat up?

Nichrome due to its high resistivity does not allow the electric energy easily to pass through it. This electrical energy is changed into heat energy. So nichrome wire gets heated in an electric circuit.

Why we use alloys instead of pure metals?

Metal alloys are more resistant to corrosion than pure metals. Metal alloys are typically much more resistant to corrosion than pure metals. This is because metal alloys are mixtures and compounds of different metals and non-metal materials that work to create a stronger and better alloy.

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Why do we use alloys rather than pure metals?

Alloys are, for example, generally harder than pure metals. They are made up of atoms of different sizes, rather than being uniform. … Alloys also tend to have better corrosion resistance than pure metals, and are more versatile for manipulating into different forms.

Why alloy is used in above appliances also write why the heating element of above appliances glow but not the cord?

The heater’s heating element is made up of an alloy that has very high resistance, so when current flows through the heating element, it becomes too hot and glows red. But the cord’s resistance, which is usually of copper or aluminium, is low, so it does not glow.