Full form of CFL used in place of electric bulbs is – (1) compact fluorescent lamp (2) constantan filament lamp (3) closed filament lamp (4) closed fluorescent lamp

Full form of CFL used in place of electric bulbs is – (1) compact fluorescent lamp (2) constantan filament lamp (3) closed filament lamp (4) closed fluorescent lamp
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(1) compact fluorescent lamp Explanation: A compact fluorescent lamp (CFL) is a fluorescent lamp designed to replace an incandescent lamp; some types fit into light fixtures formerly used for incandescent lamps.
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Full form of CFL used in place of electric bulbs is (1) compact fluorescent lamp (2) constantan filament lamp (3) closed filament lamp (4) closed fluorescent lamp

Description : Full form of CFL used in place of electric bulbs is (1) compact fluorescent lamp (2) constantan filament lamp (3) closed filament lamp (4) closed fluorescent lamp

Last Answer : compact fluorescent lamp

How does a compact fluorescent lamp consume less electricity than conventional fluorescent lamps and bulbs?

Description : How does a compact fluorescent lamp consume less electricity than conventional fluorescent lamps and bulbs?

Last Answer : Fluorescent lamps are based on the phenomenon of gas discharge between two electrodes at the ends of a glass tube. Generally these tubes contain a little mercury in the low-pressure vapour phase. When ... poor efficiency. The three types of lamps may have a typical efficiency ratio of 8:6:3.

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

A homeowner replaces a 65 watt incandescent bulb with a 15 watt compact fluorescent lamp. The light is on 2000 hours a year. If electricity cost 10 cents a kilowatt-hour, how much money is saved on the electric bill in one year? w) $50.00 x) $10.00 y) $5.00 z) $1.00

Description : A homeowner replaces a 65 watt incandescent bulb with a 15 watt compact fluorescent lamp. The light is on 2000 hours a year. If electricity cost 10 cents a kilowatt-hour, how much money is saved on the electric bill in one year? w) $50.00 x) $10.00 y) $5.00 z) $1.00 

Last Answer : ANSWER: X -- $10.00 

I have a 60 watt/120v clip-on lamp. What is the highest wattage of compact fluorescent bulb can I safely use in this lamp?

Description : I have a 60 watt/120v clip-on lamp. What is the highest wattage of compact fluorescent bulb can I safely use in this lamp?

Last Answer : By the way, I mean actual watts on the fluorescent bulb, not replacement-watts. :)

Do your Compact Fluorescent bulbs (the curly ones) last 9000 hours?

Description : Do your Compact Fluorescent bulbs (the curly ones) last 9000 hours?

Last Answer : I use them, but my house is old and the wiring, although safe (been checked by experts) is a bit funky. My curly bulbs last waaaaaaay longer than the incandescent ones, but not nearly as long as they probably ... I would log it, like you do, but I think I would be laughed at if they saw my house.

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 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

Compare the salient features of LED and CFL based on: i] Lamp Efficiency ii] Life span

Description :  Compare the salient features of LED and CFL based on: i] Lamp Efficiency ii] Life span 

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Anyone still using the (not) government mandated CFL bulbs that have to warm up and won't dim?

Description : Anyone still using the (not) government mandated CFL bulbs that have to warm up and won't dim?

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Would you have use for candelabra bulbs that were energy saving (CFL or LED), yet produced 75+ watt light equivalent?

Description : Would you have use for candelabra bulbs that were energy saving (CFL or LED), yet produced 75+ watt light equivalent?

Last Answer : answer:No, because I ate my vegetables when I was a kid and don't have a Daylight only restriction on my drivers license. Seriously though, like many people, my home lighting is 40W-equivalent for ... the lower wattage bulbs are plenty bright enough for most people. TL:DR - it's lack of demand.

Which CFL light bulbs cast the yellowest light?

Description : Which CFL light bulbs cast the yellowest light?

Last Answer : Also see http://www.fluther.com/disc/58485/have-you-ever-used-one-of-those-new-led-light-bulbs/#quip849742

What are the advantages to replaces regular incandescent light bulbs with CFL bulbs?

Description : What are the advantages to replaces regular incandescent light bulbs with CFL bulbs?

Last Answer : The CFL bulbs last for about 10,000 hours. The incandescent bulbs only last for about 1,500 hours. Most people won't go for the CFL because of the upfront costs but you'll save more money in the long run because they are also more energy efficient.

What are some recessed lighting models that use the new CFL bulbs?

Description : What are some recessed lighting models that use the new CFL bulbs?

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What track lighting models use CFL bulbs?

Description : What track lighting models use CFL bulbs?

Last Answer : All track lighting models can use CFL bulbs. The important thing is that you get the correct CFL bulb as you must get the CFL bulbs that are designed for base up use like you find in track lights, ... lighting. If the track lights are dimmable you also want to be sure to get a dimmable CFL bulb.

Calculate the number of free electrons passing through the filament of an electric lamp in one hour when the current through the filament is 0.32 A.

Description : Calculate the number of free electrons passing through the filament of an electric lamp in one hour when the current through the filament is 0.32 A.

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The filament of an electric lamp becomes white hot but the lead-in wires holding the filament are only slightly heated because they (a) have smaller current passing through them (b) have very low resistance (c) have higher melting point (d) are made of black iron

Description : The filament of an electric lamp becomes white hot but the lead-in wires holding the filament are only slightly heated because they (a) have smaller current passing through them (b) have very low resistance (c) have higher melting point (d) are made of black iron

Last Answer : Ans:(b)

The purpose of choke in a fluorescent lamp is – (1) to increase the current flow (2) to decrease the current flow (3) to decrease the resistance (4) to decrease the voltage momentarily

Description : The purpose of choke in a fluorescent lamp is – (1) to increase the current flow (2) to decrease the current flow (3) to decrease the resistance (4) to decrease the voltage momentarily

Last Answer : (2) to decrease the current flow Explanation: The choke primarily serves to limit current flow to the correct level for the tube. It also can be used during startup to provide an inductive 'kick' forming a momentary highervoltage pulse to start the lamp.

Where is a transistor most likely to be found? (1) Wrist watch (2) Fuse (3) Hearing aid (4) Fluorescent lamp

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Where is a transistor most likely to be found ? (1) Wrist watch (2) Fuse (3) Hearing aid (4) Fluorescent lamp

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The purpose of choke in a fluorescent lamp is : (1) to increase the current flow (2) to decrease the current flow (3) to decrease the resistance (4) ro decrease the voltage momentarily

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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. 

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Matrix Matching. `{:("List-I","List-II"),((A) "Gas Thermometers",(p) He),((B) "Beacon lamp", (q) Ne),((C ) "Electric bulbs",(r ) Xe),((D) "Flash bulb"

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What is the brightest Compact Fluorescent bulb?

Description : What is the brightest Compact Fluorescent bulb?

Last Answer : The brightest compact fluorescent bulb is of over 100 lumens or higher outputs at higher drive currents.

How much money do you save by using a 20 Watt Compact Fluorescent over an incandescent bulb?

Description : How much money do you save by using a 20 Watt Compact Fluorescent over an incandescent bulb?

Last Answer : An Energy Star qualified compact fluorescent light bulb can save you around $30 over it's lifetime, paying for its self in about 6 months.

Which is the secondary source of light in a fluorescent lamp? -General Knowledge

Description : Which is the secondary source of light in a fluorescent lamp? -General Knowledge

Last Answer : The answer is 'Mercury vapour'

Which is the secondary source of light in a fluorescent lamp? -General Knowledge

Description : Which is the secondary source of light in a fluorescent lamp? -General Knowledge

Last Answer : answer:

Which is the secondary source of light in a fluorescent lamp? -General Knowledge

Description : Which is the secondary source of light in a fluorescent lamp? -General Knowledge

Last Answer : answer:

Which is a better floor lamp - incandescent or fluorescent?

Description : Which is a better floor lamp - incandescent or fluorescent?

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When a fluorescent lamp fails to light, the trouble can be in the _____________. A. lamp B. starter C. ballast D. all of the above

Description : When a fluorescent lamp fails to light, the trouble can be in the _____________. A. lamp B. starter C. ballast D. all of the above

Last Answer : Answer: D

When a fluorescent lamp has reached the end of its useful life, it should be replaced immediately, or the resultant flashing may _____________. A. blow the lamp's circuit breaker B. explode, causing glass to fly in all directions C. short circuit the ballast transformer D. damage the starter and the ballast

Description : When a fluorescent lamp has reached the end of its useful life, it should be replaced immediately, or the resultant flashing may _____________. A. blow the lamp's circuit breaker B. explode, ... fly in all directions C. short circuit the ballast transformer D. damage the starter and the ballast

Last Answer : Answer: D

Which of the following components are used to assemble a fluorescent lighting system? A. Lamp B. Starter C. Ballast D. All of the above

Description : Which of the following components are used to assemble a fluorescent lighting system? A. Lamp B. Starter C. Ballast D. All of the above

Last Answer : Answer: D

Luminance efficiency is minimum for a a. Fluorescent tube b. High wattage light bulb c. Mercury vapor lamp d. Low wattage light bulb

Description : Luminance efficiency is minimum for a a. Fluorescent tube b. High wattage light bulb c. Mercury vapor lamp d. Low wattage light bulb

Last Answer : d. Low wattage light bulb

Which is the secondary source of light in a fluorescent lamp?

Description : Which is the secondary source of light in a fluorescent lamp?

Last Answer : Mercury vapour

The purpose of choke in a fluorescent lamp is

Description : The purpose of choke in a fluorescent lamp is

Last Answer : to decrease the flow of current

Luminous efficiency is least for a A. mercury vapor lamp B. low-wattage light bulb C. high-wattage light bulb D. fluorescent tube

Description : Luminous efficiency is least for a A. mercury vapor lamp B. low-wattage light bulb C. high-wattage light bulb D. fluorescent tube

Last Answer : B. low-wattage light bulb

Does frequent switching on/off of a fluorescent lamp reduce its life?

Description : Does frequent switching on/off of a fluorescent lamp reduce its life?

Last Answer : The life of a fluorescent lamp is essentially determined by life of the cathode filament it uses. A conventional fluorescent lamp employs closely wound coil of tungsten wire as filament. Upon switching on ... of continuous burning can be halved or made still less, just by frequent switching on/off.

Luminance efficiency is minimum for a ∙ a. Fluorescent tube ∙ b. High wattage light bulb ∙ c. Mercury vapor lamp ∙ d. Low wattage light bulb

Description : Luminance efficiency is minimum for a ∙ a. Fluorescent tube ∙ b. High wattage light bulb ∙ c. Mercury vapor lamp ∙ d. Low wattage light bulb

Last Answer : d. Low wattage light bulb

Which brands of fluorescent bulbs have a good rating?

Description : Which brands of fluorescent bulbs have a good rating?

Last Answer : Phillips fluorescent bulbs are a very good brand and mostly recommended by homeowners. Most brand of bulbs will turn out to brake in 3 months or less. Purchase a good quality even if you have to end up paying a little bit more than the other regular brands.

Which of the following vapour/gas will give yellow colour in a filament lamp?

Description : Which of the following vapour/gas will give yellow colour in a filament lamp?   (a) Helium (b) Mercury (c) Magnesium (d) Sodium

Last Answer : Sodium

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

The hot resistance of a bulb’s filament is higher than its cold resistance...

Description : The hot resistance of a bulb’s filament is higher than its cold resistance because the temperature coefficient of the filament is:

Last Answer : positive

The hot resistance of the bulb's filament is higher than its cold resistance because...

Description : The hot resistance of the bulb's filament is higher than its cold resistance because the temperature co-efficient of the filament is?

Last Answer : This  is  because  resistance  of  a  conductor  increases  with  increase  in  temperature .

The heating elements of electric irons are made of (A) Copper. (B) Nichrome. (C) Constantan. (D) Aluminium.

Description : The heating elements of electric irons are made of (A) Copper. (B) Nichrome. (C) Constantan. (D) Aluminium.

Last Answer : (B) Nichrome.

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.

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