Tungsten is used for making the filaments of electric bulbs because it has a very high melting point.
What is the filament of electric iron made of?
Answer: (2) nichrome
Nichrome is used as a heating element in an electric iron . It is an 80 percent nickel and 20 percent chromium alloy with nickel and chromium. It has a high melting point of 1400 degrees C.
Which filament is used in electric iron?
Tungsten has a very high melting point and very high resistivity so does not burn easily at a high temperature. The conductors of electric heating devices such as bread toasters and electric irons are made of alloy because the resistivity of an alloy is more than that of metals which produces a large amount of heat.
Which is the filament used in electric bulb Why?
Incandescent bulbs typically use a tungsten filament because of tungsten’s high melting point. A tungsten filament inside a light bulb can reach temperatures as high as 4,500 degrees Fahrenheit. … This is an elegantly simple system and it works quite well at producing light.
Which of the following is used as filament in iron box?
Tungsten is used to make the filament of an electric bulb. Electric iron box.
Why is tungsten used for making filament of bulb?
Tungsten is used in an electrical bulb because it has a high melting point and does not oxidize. Thus, the filament of tungsten does not melt even though a large amount of heat is generated due to the passage of the current through the filament (through the heating effect of the current).
Why is tungsten used for filament of electric lamps?
The metal tungsten is almost exclusively used for the filament of the electric lamp because it has a very high melting point due to which it does not melt even when it is heated to high temperatures due to the passage of electric current.
Why Nichrome wire is used in an electric iron?
nichrome has high electrical resistance ,so it gets heated up fast . It is also less reactive .
Why is nichrome used as an element in electric iron?
Note: A nichrome wire is used as a heating element because of its high melting point and high resistivity (low conductivity) also. Having a high melting does not allow the nichrome wire to melt easily when a large amount of heat is produced. … Hence, nichrome has high resistivity and low conductivity.
Why is mica used in iron?
Mica is a good conductor of heat. It protects the filament from the outer body of electric iron. … Mica provides high thermal resistance as it is a good insulator. Therefore, these properties of mica are suitable to use in an electric iron.
Which element is used to make filament give two reasons?
Tungsten is used for making filament of an electric bulb due to the following reasons: Being an alloy it has a very high melting point. It has very high resistivity so it does not burn easily at room temperature. The lamp glows at high temperatures.
What is the filament of a bulb made of and why?
This thin wire is called the filament of the bulb. Whenever electric current flows through the filament, it glows. To ensure an optimal production of light, the filament is usually made up of coils of fine wire, or coiled wire. … Now, filaments of electric bulbs are made up of tungsten.
What is electric filament?
The filament is the part of the light bulb that produces light. Filaments in incandescent light bulbs are made of tungsten. Whenever an electric current goes through the filament, the filament glows. It may also be known as the electron emitting element in a vacuum tube.