Filament of a bulb is made up of:

Content Curator

The filament of an incandescent light bulb is a crucial component that is responsible for producing light. The filament is made of a thin wire, typically made of tungsten, which is heated to a high temperature by an electric current to produce light. Tungsten is an ideal material for use in incandescent light bulbs due to its high melting point and low vapor pressure. This means that the tungsten filament can be heated to very high temperatures without melting or evaporating, making it suitable for use in incandescent light bulbs.

Light Bulb

Light Bulb

Tungsten is a chemical element with the symbol W and atomic number 74. It is a dense, silvery-white metal that is known for its high melting point and high strength. Some important facts about tungsten include:

High melting point: Tungsten has the highest melting point of all the elements, at 3410°C. This makes it an ideal material for high-temperature applications, such as in furnace linings and high-temperature electrical components.
High density: Tungsten is one of the densest elements, with a density of 19.25 grams per cubic centimeter. This high density makes it useful for weighting applications, such as in fishing lures and golf club heads.
High strength: Tungsten has a high tensile strength, making it useful for a variety of structural applications.
Electrical and thermal conductivity: Tungsten is a good conductor of electricity and heat, making it useful for electrical and thermal applications.
Chemical properties: Tungsten is highly resistant to corrosion and is not affected by air or water, even at high temperatures. This makes it useful for chemical and structural applications where resistance to corrosion is important.
Production: Tungsten is mostly produced from tungsten ore, which is commonly found in China, Russia, and Canada. The production process involves reducing tungsten oxide to produce tungsten metal.
Uses: Tungsten is used in a variety of applications, including electrical and electronic components, alloys, furnace linings, and high-temperature structural materials. Tungsten is also used as a catalyst in chemical reactions and as a radiation shielding material.

Overall, the filament of an incandescent light bulb is an important component that plays a crucial role in producing light. The use of tungsten as the material for the filament helps to ensure that the bulb can produce light efficiently and effectively.

Also check:

Read more about Electric current
Current Electricity	Ohm’s Law And its Limitations	Unit of Electricity
Circuit Diagram	Unit of Current	Difference between earth and neutral
Electric Current Formula	Types of Current	Power Of Alternating Current

CBSE CLASS XII Related Questions

1.
Write two advantages of reflecting telescope over refracting telescope.

View Solution

2.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

3.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

\( (M_x - M_z)<M_y \)
\( (M_x - M_y)<M_z \)
\( M_x>(M_y + M_z) \)
\( M_x<(M_y + M_z) \)

View Solution

4.
An astronomical telescope consists of two converging lenses. One of them of large aperture and large focal length is called objective lens and the other one, of smaller focal length and smaller aperture is called the eyepiece. It is used to see distant objects which are not seen clearly with naked eyes. The image formed by the objective lens acts as an object for the eyepiece and the final image produced by the eyepiece is magnified.

5.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

View Solution

6.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

View Solution

Filament of a bulb is made up of:

CBSE CLASS XII Related Questions

1.
Write two advantages of reflecting telescope over refracting telescope.

2.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

3.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

5.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

6.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

Comments

SUBSCRIBE TO OUR NEWS LETTER

Filament of a bulb is made up of:

CBSE CLASS XII Related Questions

1.Write two advantages of reflecting telescope over refracting telescope.

2.A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

3.Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

5.This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

6.Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Write two advantages of reflecting telescope over refracting telescope.

2.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

3.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

5.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

6.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.