Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?

Question

Answer

The melting point of an alloy is much higher than a pure metal because of its high resistivity. At high temperatures, alloys do not melt readily. Therefore, alloys are used in heating appliances such as electric toasters and electric irons.

Answer

Coils of electric toasters and electric irons made of an alloy rather than a pure metal because the resistivity of an alloy is higher than the pure metal. Also at high temperatures, the alloys do not melt easily

Answer

The Reason for Using Alloy in Coils of Electric Toasters and Electric Irons

To understand why coils of electric toasters and electric irons are made of an alloy rather than a pure metal, we need to delve into the properties and characteristics of alloys and pure metals.

Introduction to Alloys
An alloy is a mixture of two or more metals or a metal and a non-metal. It is formed by combining different elements to create a material that possesses enhanced properties compared to the individual metals. Alloys are commonly used in various industries due to their improved strength, durability, resistance to corrosion, and other desirable qualities.

Advantages of Using Alloy in Coils
When it comes to the coils of electric toasters and electric irons, the use of alloys offers several advantages:

1. Resistance: Alloys have higher electrical resistance compared to pure metals. The resistance of a material determines how effectively it converts electrical energy into heat. By using alloys with higher resistance, the coils can generate more heat, making them suitable for applications that require heating, such as toasters and irons.

2. Stability: Alloys are more stable at higher temperatures compared to pure metals. The coils in toasters and irons can reach high temperatures during operation, and using an alloy ensures that the coils maintain their structural integrity even under these extreme conditions.

3. Strength and Durability: Alloys often exhibit greater strength and durability than pure metals due to their unique microstructure. This allows the coils to withstand the stresses and strains of repeated heating and cooling cycles without cracking or breaking.

4. Corrosion Resistance: Alloys can be engineered to have better resistance to corrosion compared to pure metals. This is particularly important for electric toasters and irons, as they often come into contact with moisture or steam during use. By using corrosion-resistant alloys, the coils can maintain their performance and longevity.

5. Cost-Effectiveness: Alloys can be tailored to meet specific requirements, allowing manufacturers to optimize the performance of the coils while keeping production costs under control. This makes alloys a cost-effective choice for mass production of appliances like toasters and irons.

Conclusion
In conclusion, the use of alloys in coils of electric toasters and electric irons offers various advantages, including enhanced electrical resistance, stability at high temperatures, increased strength and durability, corrosion resistance, and cost-effectiveness. These properties make alloys the ideal choice for ensuring efficient and reliable heating in these appliances.

Similar Class 10 Doubts

Why are the heating elements of electric toaster and electric irons made of an alloy rather than a pure metal?

Why are the coil of electric toaster and electric iron made up of an alloy rather than a pure metals ?

Directions: In the following questions, a statement of assertion (

An electric lamp of 100ohm, a toaster of 50 ohm and a water filter 500ohm are connected in parallel to a 220V source. What is the resistance of an electric iron connected to the same source that takes as much current as all the three appliances and what is the current through it?

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