Circuit diagram at tungsten filament bulb

Circuit diagram at tungsten filament bulb
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Circuit diagram at tungsten filament bulb

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Why is the filament of electric bulb made of tungsten ?

Description : Why is the filament of electric bulb made of tungsten ?

Last Answer : When electricity flows through the coil or filament of the thin wire of the bulb, it becomes very hot and radiates all around. Tungsten is a metal with the highest melting point and the highest tensile strength, making it a filament to make the bulb more durable.

After long periods of use, a gray spot develops on the inside of a bulb. This is because of: A. The tungsten filament evaporates and collects there B. The heat of the bulb scorches the glass at the top C. Dust inside the bulb condenses on the top D. Glass undergoes a change due to the heat

Description : After long periods of use, a gray spot develops on the inside of a bulb. This is because of: A. The tungsten filament evaporates and collects there B. The heat of the bulb scorches the glass at the top C. Dust inside the bulb condenses on the top D. Glass undergoes a change due to the heat

Last Answer : ANSWER: A

Consider the following statements: 1. when an electric bulb is switched on, the resistance of its tungsten filament increases. 2. the resistance of pure metals increases on heating. Which of the above statements is/are correct? (a) Both 1 and 2 (b) only 1 (c) only 2 (d) Neither 1 nor 2

Description : Consider the following statements: 1. when an electric bulb is switched on, the resistance of its tungsten filament increases. 2. the resistance of pure metals increases on heating. Which of the above statements is/are correct? (a) Both 1 and 2 (b) only 1 (c) only 2 (d) Neither 1 nor 2

Last Answer : Ans:(a)

Air is completely removed from an electric bulb to prevent (a) oxidation of tungsten filament (b) bursting of the bulb (c) loss of light due to absorption (d) none of these

Description : Air is completely removed from an electric bulb to prevent (a) oxidation of tungsten filament (b) bursting of the bulb (c) loss of light due to absorption (d) none of these

Last Answer : Ans:(a)

An electric bulb has a filament made of (a) Copper (b) Iron (c) Lead (d) Tungsten

Description : An electric bulb has a filament made of (a) Copper (b) Iron (c) Lead (d) Tungsten

Last Answer : Ans:(d)

After long periods of use, a grey spot develops on the inside of a bulb. This is because – (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Description : After long periods of use, a grey spot develops on the inside of a bulb. This is because – (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Last Answer : (3) dust inside the bulb condenses on the top Explanation: At high operating temperatures, tungsten evaporates from the filament and gradually forms a gray film on the inside of the bulb. The inert ... spot develops in the filament. When this happens, the filament will break and the bulb fails.

The filament of electric bulb is made of (1) Iron (2) Nichrome (3) Tungsten (4) Graphite

Description : The filament of electric bulb is made of (1) Iron (2) Nichrome (3) Tungsten (4) Graphite

Last Answer : (3) Tungsten Explanation: The filament is the part of the light bulb that produces light. Filaments in incandescent light bulbs are made of tungsten.

Tungsten is used for the manufacture of the filament of an electric bulb, because – (1) It is a good conductor (2) It is economical (3) It is malleable (4) It has a very high melting point

Description : Tungsten is used for the manufacture of the filament of an electric bulb, because – (1) It is a good conductor (2) It is economical (3) It is malleable (4) It has a very high melting point

Last Answer : (4) It has a very high melting point Explanation: Tungsten is used because it has the highest melting point of all the metallic elements. It melts at 3410 degrees Celsius. When current passes ... bulb. The first successful light bulb filaments were made of carbon (from carbonized paper or bamboo).

The filament of electric bulb is made up of : (1) Copper (2) Nichrome (3) Lead (4) Tungsten

Description : The filament of electric bulb is made up of : (1) Copper (2) Nichrome (3) Lead (4) Tungsten

Last Answer : (4) Tungsten Explanation: An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light which produces light with a filament wire heated to a high temperature by an electric ... through it, until it glows. Tungsten, also known as wolfram, is a chemical element.

For the filament of electric bulb tungsten is used because

Description : For the filament of electric bulb tungsten is used because

Last Answer : Its Melting point is very high

After long periods of use, a grey spot develops on the inside of a bulb. This is because (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Description : After long periods of use, a grey spot develops on the inside of a bulb. This is because (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Last Answer : dust inside the bulb condenses on the top

The filament of electric bulb is made up of : (1) Copper (2) Nichrome (3) Lead (4) Tungsten

Description : The filament of electric bulb is made up of : (1) Copper (2) Nichrome (3) Lead (4) Tungsten

Last Answer : Tungsten

Tungsten is used for the manufacture of the filament of an electric bulb, because (1) It is a good conductor (2) It is economical (3) It is malleable (4) It has a very high melting point

Description : Tungsten is used for the manufacture of the filament of an electric bulb, because (1) It is a good conductor (2) It is economical (3) It is malleable (4) It has a very high melting point

Last Answer : It has a very high melting point

Explain with neat circuit diagram, low pressure mercury vapour lamp.

Description : Explain with neat circuit diagram, low pressure mercury vapour lamp.

Last Answer : Diagram of low pressure mercury vapour lamp:  Working:-  Whenever 1-ph, 230V, AC Supply is provided to the discharge tube of MVL initially to current will flow from Phase to the ... Capacitor: The function of power factor improvement capacitor is to improve the power factor 0.5 to 0.95 

If the filament of the bulb is broken would the circuit be complete?

Description : If the filament of the bulb is broken would the circuit be complete?

Last Answer : If the bulb's filament is broken, the whole circuit becomes open. If the bulb is in a series circuit or is the only bulb, the electricity would no longer flow. If the bulb is in a parallel circuit, along with other bulbs, then only the blown bulb would go out, and the other bulbs would still work.

What two properties of the metal tungsten that make it good material for the filament?

Description : What two properties of the metal tungsten that make it good material for the filament?

Last Answer : Magnesium and Titanium.

The element used in an electric filament is (a) Copper (b) Aluminium (c) Iron (d) Tungsten

Description : The element used in an electric filament is (a) Copper (b) Aluminium (c) Iron (d) Tungsten

Last Answer : Ans:(d)

The material used in the filament of electric bulbs is (A) Nichrome (B) Tungsten (C) Constantan (D) German silver

Description : The material used in the filament of electric bulbs is (A) Nichrome (B) Tungsten (C) Constantan (D) German silver

Last Answer : (B) Tungsten

Neon gas is (A) Flammable in nature (B) Used in color discharge tube (C) Filled in lamps having tungsten filament (D) All (A), (B) and (C)

Description : Neon gas is (A) Flammable in nature (B) Used in color discharge tube (C) Filled in lamps having tungsten filament (D) All (A), (B) and (C)

Last Answer : (B) Used in color discharge tube

The filament of an electric bulb is made of which metal? -General Knowledge

Description : The filament of an electric bulb is made of which metal? -General Knowledge

Last Answer : The answer is 'Tungsten'

The filament of an electric bulb is made of which metal? -General Knowledge

Description : The filament of an electric bulb is made of which metal? -General Knowledge

Last Answer : answer:

The filament of a bulb is made up of -General Knowledge

Description : The filament of a bulb is made up of -General Knowledge

Last Answer : answer:

Filament of electric bulb is made of which metal ?

Description : Filament of electric bulb is made of which metal ?

Last Answer : The filament of an electric bulb is made of tungsten metal.

Will the filament resistance of a bulb be higher at normal temperature or in incandescent condition ?

Description : Will the filament resistance of a bulb be higher at normal temperature or in incandescent condition ?

Last Answer : As the resistance increases with increasing temperature, the resistance of the filament of the bulb will be higher than the normal temperature.

In order to prevent the hot metal filament from getting burnt, when the electric current is switched on, the bulb is filled with

Description : In order to prevent the hot metal filament from getting burnt, when the electric current is switched on, the bulb is filled with

Last Answer : In order to prevent the hot metal filament from getting burnt, when the electric current is switched on, the bulb is ... gas C. `CO_(2)` D. `Cl_(2)`

A filament bulb `(500 W, 100 V)` is to be used in a `230 V` main supply. When a resistance `R` is connected in series, it works perfectly and the bulb

Description : A filament bulb `(500 W, 100 V)` is to be used in a `230 V` main supply. When a resistance `R` is connected in series, it works perfectly and the bulb

Last Answer : A filament bulb `(500 W, 100 V)` is to be used in a `230 V` main supply. When a resistance `R` is ... Omega` B. `46 Omega` C. `26Omega` D. `13 Omega`

What is the status of a bulb with a broken filament?

Description : What is the status of a bulb with a broken filament?

Last Answer : With a broken filament, the bulb is dead. It needs to be replaced with a new bulb.

How many wires are normally connected to a double- filament light bulb?

Description : How many wires are normally connected to a double- filament light bulb?

Last Answer : 5

Why a bulb with a filament gives off light?

Description : Why a bulb with a filament gives off light?

Last Answer : Electricity goes through the filament in the bulb.The filament is made of a material that is not a good conductor and therefore offers "resistance" to the electricity going through it.The "resistance" results ... hot, then very hot.The filament gets so hot that it starts to glow, giving off light.

The filament of an electric bulb is made of which metal

Description : The filament of an electric bulb is made of which metal

Last Answer : Tungsten

By what process is heat transmitted from the filament of an evacuated electric bulb to the glass? (a) Conduction (b) Convection (c) Radiation (d) Heat cannot be transmitted through vacuum

Description : By what process is heat transmitted from the filament of an evacuated electric bulb to the glass? (a) Conduction (b) Convection (c) Radiation (d) Heat cannot be transmitted through vacuum

Last Answer : Ans:(c)

In a filament type light bulb most of the electric power consumed appears as – (1) visible light (2) infra-red rays (3) ultra-violet rays (4) fluorescent light

Description : In a filament type light bulb most of the electric power consumed appears as – (1) visible light (2) infra-red rays (3) ultra-violet rays (4) fluorescent light

Last Answer : (2) infra-red rays Explanation: When electricity is passed through the filament, the filament gets hot. Depending on the temperature of the filament, radiation is emitted from the filament. The ... energy converts into visible light and rest of it is emitted as heat or infrared radiation.

In a Filament type Light bulb most of the electric power consumed appear as

Description : In a Filament type Light bulb most of the electric power consumed appear as

Last Answer : Infrared rays

The filament of electric bulb is made up o

Description : The filament of electric bulb is made up o

Last Answer : Tungsten

The filament of an electric bulb is made of which metal?

Description : The filament of an electric bulb is made of which metal?

Last Answer : Tungsten

There are three bulbs of 60W 100W and 200W which bulb has thickest filament. a. 100W b. 200W c. 60W d. All

Description : There are three bulbs of 60W 100W and 200W which bulb has thickest filament. a. 100W b. 200W c. 60W d. All

Last Answer : b. 200W

Is the filament resistance lower or higher in a 500 watt light bulb than in a 100 watt light? Assume that both bulbs have been designed to operate at 110 volts.

Description : Is the filament resistance lower or higher in a 500 watt light bulb than in a 100 watt light? Assume that both bulbs have been designed to operate at 110 volts. 

Last Answer : ANSWER: LOWER

In a filament type light bulb most of the electric power consumed appears as (1) visible light (2) infra-red rays (3) ultra-violet rays (4) fluorescent light

Description : In a filament type light bulb most of the electric power consumed appears as (1) visible light (2) infra-red rays (3) ultra-violet rays (4) fluorescent light

Last Answer : infra-red rays

The filament of an electric bulb is made of?

Description : The filament of an electric bulb is made of?

Last Answer : The filament of an electric bulb is made of tungsten.

Which one of the following materials is useful for making bulb filaments? a. aluminum b. Iron c. Copper d. Tungsten

Description : Which one of the following materials is useful for making bulb filaments? a. aluminum b. Iron c. Copper d. Tungsten

Last Answer : a. aluminum

State any four specific requirements of street lighting.

Description : State any four specific requirements of street lighting.

Last Answer : Following specific requirements of street lighting: 1. The street lighting should be such that the object can be seen by driver of any vehicle. 2. The street lighting should be attractive. 3. It should ... . 3) To make the street more attractive. 4) To increase the community value of the street.

Use of polar curves in illumination Engg

Description : Use of polar curves in illumination Engg

Last Answer : The polar curves are required to determine the mean horizontal candle power (MHCP) and mean hemispherical candle power (MHSCP).The polar curves are due to limitations of unsymmetrical design shape of ... lighting scheme. 2. To know the intensity of light emitted by the source in different direction

State any four characteristics of flood lighting.

Description : State any four characteristics of flood lighting.

Last Answer : Following are the specific characteristics of flood lighting:- 1. Ideal for landscape and architecture lighting. 2. Widely used in home for the showroom purpose, office decoration, garden ... very simple. The control, multicolour light intensity control is also possible in electrical illumination.

Draw and explain how one lamp can be controlled by two switch. State application of it.

Description : Draw and explain how one lamp can be controlled by two switch. State application of it.

Last Answer : ‏Write down the application of two-way switche

State any six factors on which efficiency of lighting depends.

Description : State any six factors on which efficiency of lighting depends.

Last Answer : 1) Level of illumination or degree of illumination: It depends on nature of work to be carried out. The degree of level of illumination also depends on following factors. i) The size of ... Distribution of lux on working plane: The lux level on working plane should be uniformly distributed.

Define each of following terms of illumination — lux, lumen, luminous flux, illumination.

Description : Define each of following terms of illumination — lux, lumen, luminous flux, illumination.

Last Answer : i) Lux :- It is unit of illumination and it is defined as luminous flux falling per unit area  ii) Lumen: It is defined as the luminous flux emitted by a source of one candle power per unit ... the given surface on the working plane. The unit of illumination is lumens/m2 OR lumens/m2 = 1 Lux

The arcing contacts in a circuit breaker are made of (a) copper tungsten alloy (b) porcelain (c) electrolytic copper (d) aluminium alloy

Description : The arcing contacts in a circuit breaker are made of (a) copper tungsten alloy (b) porcelain (c) electrolytic copper (d) aluminium alloy

Last Answer : (a) copper tungsten alloy

With the help of suitable diagram, explain how humidity is measured with dry and wet bulb thermometer.

Description : With the help of suitable diagram, explain how humidity is measured with dry and wet bulb thermometer.

Last Answer : Explanation:- 1. A psychrometer, or wet-and-dry-bulb thermometer, consists of two thermometers, one that is dry and one that is kept moist with distilled water on a sock or ... , and in the HVAC industry for proper refrigerant charging of residential and commercial air conditioning systems. 

If you remove one bulb from a string of lights all the remaining lights will go out. are the lights in a series circuit or parallel circuit Explain?

Description : If you remove one bulb from a string of lights all the remaining lights will go out. are the lights in a series circuit or parallel circuit Explain?

Last Answer : Removing any bulb breaks the continuity of a series circuit, stopping the flow of electrical current. Removing a bulb in a parallel circuit does not interrupt the current flow, so the remaining lights continue to conduct electrical current.

How would you make a bulb in a circuit shine with a dimmer light?

Description : How would you make a bulb in a circuit shine with a dimmer light?

Last Answer : Add a resistor between the power source and one side of thebulb.