Why alloys like nichrome are used in the heating appliances ?

Question

Answer

Nichrome alloy is used for making the heating elements of electrical appliances because:
(i) nichrome has very high resistivity
(ii) nichrome does not undergo oxidation (or burn) easily even at high temperature

Answer

Due to the below reasons , it is used

1) since nichrome is an alloy, it has a higher resisistivity and consequently a higher resistance. Therefore, it will resist the flow of charges more, and lead to development of heat faster

2) Alloys like nichrome don't oxidise, i. e. burn easily at high temperatures. This means that even after prolonged durations of heating, the nichrome won't melt off and burn. Alloys have higher melting and boiling point than metal

3)using an alloy is energy efficient. Conductors offer little resistnace to electrons, and hence will heat up very slowly. However, nichrome has higher resistance, which means that it will produce a larger amount of energy in the same amount of time and current than a conductor

Answer

Why Alloys like Nichrome are used in Heating Appliances?

Nichrome is a popular alloy used in heating appliances for several reasons. Let's explore why it is preferred for this purpose.

Resistance to High Temperatures
- One of the primary reasons nichrome is used in heating appliances is its high resistance to temperatures. Nichrome can withstand extremely high temperatures without melting or deforming, making it ideal for heating elements.

Uniform Heating
- Nichrome has a high electrical resistivity, which means it can generate heat evenly across its surface. This property ensures that the heating element heats up uniformly, providing consistent heat distribution.

Quick Heating and Cooling
- Another advantage of nichrome is its ability to heat up and cool down quickly. This rapid response time allows heating appliances to reach the desired temperature faster and saves energy in the process.

Corrosion Resistance
- Nichrome is also resistant to corrosion, which is essential for heating appliances that come in contact with moisture or other corrosive substances. This property helps prolong the lifespan of the heating element.

Longevity
- Heating appliances are used frequently, so durability is crucial. Nichrome's robust nature and resistance to oxidation ensure that the heating element lasts a long time, reducing the need for frequent replacements.

Cost-Effectiveness
- While nichrome may be slightly more expensive than other materials, its longevity and efficiency make it a cost-effective choice in the long run. The minimal maintenance required for nichrome heating elements also adds to their cost-effectiveness.

In conclusion, alloys like nichrome are preferred in heating appliances due to their high-temperature resistance, uniform heating capabilities, quick response time, corrosion resistance, longevity, and cost-effectiveness. These properties make nichrome an excellent choice for various heating applications.

Answer

Kyu ki Nichrome wires me resistance jyada.. hota h, jiski wgh se wo jyada jldi heat hota h or Nichrome wire ka milting point bhi jyada hota h, copper se 60x jyada ,jiski wgh se jldi burn nhi hota

Answer

2nd

Similar Class 10 Doubts

Alloys are commonly used in electrical heating devices like electronic iron and heater .?

1.Why are alloys used to make heating element of electric devices? 2 .Give reason.- a. Tungsten is used to make filament of electric bulb. b. Electric bulb is filled with inactive gases like Nitrogen and Argon?

resistance increases as temperature increases...but some alloys like nichrome are very negligible to temperature and not changes It's resistance according to temperature ...y it is like that....??????

Observe the following table and answer the questions. Electrical resistivities of some substances, at 20°C are given as follows:Q. Nichrome is used in the heating elements of electric heating device because

In electric heating appliances the material of the heating element is

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