Filament of a bulb is made up of:

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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.
(I) The real image of an object placed between $f$ and $2f$ from a convex lens can be seen on a screen placed at the image location. If the screen is removed, is the image still there? Explain.
(II) Plane and convex mirrors produce virtual images of objects. Can they produce real images under some circumstances? Explain.

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2.
Find the ratio $\dfrac{\lambda_\alpha}{\lambda_p}$ of the de Broglie wavelength $\lambda_\alpha$ associated with an alpha particle to the de Broglie wavelength $\lambda_p$ associated with a proton if both are moving with the same velocity.

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3.
Draw the plot of potential energy of a pair of nucleons as a function of their separation. Write two important conclusions that can be drawn from this plot.

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4.
A square loop of side 0.50 m is placed in a uniform magnetic field of 0.4 T perpendicular to the plane of the loop. The loop is rotated through an angle of $60^\circ$ in 0.2 s. The value of emf induced in the loop will be:

5 V
3.5 V
2.5 V
Zero V

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5.
A current of $4.0\,\text{A}$ flows through a wire of length $1\,\text{m}$ and cross-sectional area $1.0\,\text{mm}^2$, when a potential difference of $2\,\text{V}$ is applied across its ends. Calculate the resistivity of the material of the wire.

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6.
The number of free electrons per unit volume ($\text{m}^3$) in a wire made of copper (resistivity $1.72 \times 10^{-8}\,\Omega\,\text{m}$) is $8.5 \times 10^{28}$. Calculate the average number of collisions made by an electron in one second when an electric field is maintained in the wire.

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Filament of a bulb is made up of:

CBSE CLASS XII Related Questions

2.
Find the ratio $\dfrac{\lambda_\alpha}{\lambda_p}$ of the de Broglie wavelength $\lambda_\alpha$ associated with an alpha particle to the de Broglie wavelength $\lambda_p$ associated with a proton if both are moving with the same velocity.

3.
Draw the plot of potential energy of a pair of nucleons as a function of their separation. Write two important conclusions that can be drawn from this plot.

4.
A square loop of side 0.50 m is placed in a uniform magnetic field of 0.4 T perpendicular to the plane of the loop. The loop is rotated through an angle of $60^\circ$ in 0.2 s. The value of emf induced in the loop will be:

5.
A current of \(4.0\,\text{A}\) flows through a wire of length \(1\,\text{m}\) and cross-sectional area \(1.0\,\text{mm}^2\), when a potential difference of \(2\,\text{V}\) is applied across its ends. Calculate the resistivity of the material of the wire.

6.
The number of free electrons per unit volume ($\text{m}^3$) in a wire made of copper (resistivity $1.72 \times 10^{-8}\,\Omega\,\text{m}$) is $8.5 \times 10^{28}$. Calculate the average number of collisions made by an electron in one second when an electric field is maintained in the wire.

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Filament of a bulb is made up of:

CBSE CLASS XII Related Questions

2.Find the ratio $\dfrac{\lambda_\alpha}{\lambda_p}$ of the de Broglie wavelength $\lambda_\alpha$ associated with an alpha particle to the de Broglie wavelength $\lambda_p$ associated with a proton if both are moving with the same velocity.

3.Draw the plot of potential energy of a pair of nucleons as a function of their separation. Write two important conclusions that can be drawn from this plot.

4.A square loop of side 0.50 m is placed in a uniform magnetic field of 0.4 T perpendicular to the plane of the loop. The loop is rotated through an angle of $60^\circ$ in 0.2 s. The value of emf induced in the loop will be:

5.A current of \(4.0\,\text{A}\) flows through a wire of length \(1\,\text{m}\) and cross-sectional area \(1.0\,\text{mm}^2\), when a potential difference of \(2\,\text{V}\) is applied across its ends. Calculate the resistivity of the material of the wire.

6.The number of free electrons per unit volume ($\text{m}^3$) in a wire made of copper (resistivity $1.72 \times 10^{-8}\,\Omega\,\text{m}$) is $8.5 \times 10^{28}$. Calculate the average number of collisions made by an electron in one second when an electric field is maintained in the wire.

Comments

SUBSCRIBE TO OUR NEWS LETTER

2.
Find the ratio $\dfrac{\lambda_\alpha}{\lambda_p}$ of the de Broglie wavelength $\lambda_\alpha$ associated with an alpha particle to the de Broglie wavelength $\lambda_p$ associated with a proton if both are moving with the same velocity.

3.
Draw the plot of potential energy of a pair of nucleons as a function of their separation. Write two important conclusions that can be drawn from this plot.

4.
A square loop of side 0.50 m is placed in a uniform magnetic field of 0.4 T perpendicular to the plane of the loop. The loop is rotated through an angle of $60^\circ$ in 0.2 s. The value of emf induced in the loop will be:

5.
A current of \(4.0\,\text{A}\) flows through a wire of length \(1\,\text{m}\) and cross-sectional area \(1.0\,\text{mm}^2\), when a potential difference of \(2\,\text{V}\) is applied across its ends. Calculate the resistivity of the material of the wire.

6.
The number of free electrons per unit volume ($\text{m}^3$) in a wire made of copper (resistivity $1.72 \times 10^{-8}\,\Omega\,\text{m}$) is $8.5 \times 10^{28}$. Calculate the average number of collisions made by an electron in one second when an electric field is maintained in the wire.