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

Which is the secondary source of light in a fluorescent lamp? -General Knowledge
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The answer is 'Mercury vapour'
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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 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

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

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

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

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

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. :)

Which is a better floor lamp - incandescent or fluorescent?

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

Last Answer : Incandescent floor lamps emit a lower ray of light, therefore you won't get as bright a light shine. A flourescnet light is much brighter. It really depends on where you will put the lamp.

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

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

Last Answer : (3) Hearing aid Explanation: A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. The transistor invented in 1948 was well suited to the ... aids were an early adopter of transistors. Transistors replaced the need for batteries in hearing aids

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 : (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.

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

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

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.

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.

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

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

Last Answer : Hearing aid

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

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) ro decrease the voltage momentarily

Last Answer :  to decrease the current flow

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

What current is required to light two 75 watt lamps and one 40 watt lamp when connected in series to a 120 volt power source? A. 0.161 amperes B. 0.631 amperes C. 1.583 amperes D. 6.199 amperes

Description : What current is required to light two 75 watt lamps and one 40 watt lamp when connected in series to a 120 volt power source? A. 0.161 amperes B. 0.631 amperes C. 1.583 amperes D. 6.199 amperes

Last Answer : Answer: C

Can I replace a 60 watt incandescent light bulb with a fluorescent or LED bulb that puts out more light than the incandescent?

Description : Can I replace a 60 watt incandescent light bulb with a fluorescent or LED bulb that puts out more light than the incandescent?

Last Answer : Light output is measured in lumens, and yes, you can find a fluorescent bulb in lumen output equal to or greater than an incandescent 75 or 100 watt bulb.And it won’t be anywhere near 60 watts, so you are safe.

Where can I buy fluorescent light fixtures?

Description : Where can I buy fluorescent light fixtures?

Last Answer : Fluorescent light fixtures can be purchases at a wide variety of outlets, including your local office supply, electronics stores, and numerous venues online. Amazon offers very competitive prices for office lighting fixtures.

Can I use fluorescent light fixtures outdoors?

Description : Can I use fluorescent light fixtures outdoors?

Last Answer : You can use compact fluorescent lights indoors or outdoors. The only problem is if the connection between bulb and light socket gets wet, but this is the case with any bulb and fixture so outdoor lights are designed to keep it dry.

Which is printed on a commonly used fluorescent tube light?

Description : Which is printed on a commonly used fluorescent tube light?

Last Answer : – 6500 k

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.

A handheld digital tachometer could give a bad reading if ___________________. A. aimed directly at the shaft B. partially aimed at a 60 Hz. fluorescent light C. positioned 5-10 inches from the shaft D. the tape is too shiny

Description : A handheld digital tachometer could give a bad reading if ___________________. A. aimed directly at the shaft B. partially aimed at a 60 Hz. fluorescent light C. positioned 5-10 inches from the shaft D. the tape is too shiny

Last Answer : Answer: B

The device shown in the illustration is a/an ____________. EL-0083 A. noise filtering choke B. autotransformer C. fluorescent light ballast D. power factor correction inductor

Description : The device shown in the illustration is a/an ____________. EL-0083 A. noise filtering choke B. autotransformer C. fluorescent light ballast D. power factor correction inductor

Last Answer : Answer: B

The diagram shown in the illustration represents a _________. EL-0058 A. dual speed, 2-winding motor controller B. navigation running light circuit C. single phase, 2-motor selectable starter D. common fluorescent lighting circuit

Description : The diagram shown in the illustration represents a _________. EL-0058 A. dual speed, 2-winding motor controller B. navigation running light circuit C. single phase, 2-motor selectable starter D. common fluorescent lighting circuit

Last Answer : Answer: B

Which is printed on a commonly used fluorescent tube light?

Description : Which is printed on a commonly used fluorescent tube light?

Last Answer : 6500 k

Differentiate between the following pairs. (a) Radiotherapy & Chemotherapy (b) Penumbra & Umbra (c) Springtides & Neaptides (d) Vertebrates &. Invertebrates (e) Fluorescent light & Neon signs

Description : Differentiate between the following pairs. (a) Radiotherapy & Chemotherapy (b) Penumbra & Umbra (c) Springtides & Neaptides (d) Vertebrates &. Invertebrates (e) Fluorescent light & Neon signs

Last Answer : (a) Radiotherapy & Chemotherapy Radiotherapy: Radiation therapy (or radiotherapy) is the medical use of ionizing radiation as part of cancer treatment to control malignant cells. Radiotherapy may be ... Crookes tube), which is a glass tube for demonstrating the principles of electrical discharge.

Fluorescent dyes are added in detergents to (A) Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics (B) Attain distinctiveness from other brands (C) Act as tarnish inhibitor for metals like German silver (D) None of these

Description : Fluorescent dyes are added in detergents to (A) Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics (B) Attain distinctiveness ... brands (C) Act as tarnish inhibitor for metals like German silver (D) None of these

Last Answer : (A) Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics

Working of the Fluorescent Tube Light

Description : Working of the Fluorescent Tube Light

Last Answer : The fluorescent lamp circuit consists of a choke, a starter, a fluorescent tube and a frame. The length of the commonly used fluorescent tube is 100 cm; its power rating is 40 W ... momentary high voltage surge across the two filaments. Ionization takes place through argon and produces bright light.

The delay fuses are used for the protection of ________ . (a) motors (b) power outlet circuits (c) fluorescent lamps (d) light circuits

Description : The delay fuses are used for the protection of ________ . (a) motors (b) power outlet circuits (c) fluorescent lamps (d) light circuits

Last Answer : (a) motors

How is invisible light changed to visible light in a fluorescent light?

Description : How is invisible light changed to visible light in a fluorescent light?

Last Answer : Invisible light photons (ultraviolet) bombard the phosphor atom in the light tube. The phosphor atoms emit visible light photons.

The gingival portion of natural teeth differs in colour from the incisal portion because the : A. Lighting angle is different B. Gingival and incisal portions have different fluorescent qualities C. Gingival area has a dentine background D. Incident light is different

Description : The gingival portion of natural teeth differs in colour from the incisal portion because the : A. Lighting angle is different B. Gingival and incisal portions have different fluorescent qualities C. Gingival area has a dentine background D. Incident light is different

Last Answer : C. Gingival area has a dentine background

How to Replace a Fluorescent Light Ballast ?

Description : How to Replace a Fluorescent Light Ballast ?

Last Answer : How to Replace a Fluorescent Light Ballast You can count on fluorescent bulbs to shine brightly for different areas in your home, but they need to be replaced every now and then. Sometimes though, the ... time by replacing the ballast. Just follow these easy tips and you'll do this in no time.

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

Which mirror is to be used to obtain a parallel beam of light from a small lamp ? -General Knowledge

Description : Which mirror is to be used to obtain a parallel beam of light from a small lamp ? -General Knowledge

Last Answer : The answer is 'Concave mirror'

Which mirror is to be used to obtain a parallel beam of light from a small lamp ? -General Knowledge

Description : Which mirror is to be used to obtain a parallel beam of light from a small lamp ? -General Knowledge

Last Answer : answer:

Which mirror is to be used to obtain a parallel beam of light from a small lamp ? -General Knowledge

Description : Which mirror is to be used to obtain a parallel beam of light from a small lamp ? -General Knowledge

Last Answer : answer:

A lamp has a source voltage of 110 volts and a current of 0.9 amps. What is the resistance of the lamp? A. 0.008 ohms B. 0.08 ohms C. 12.22 ohms D. 122.22 ohms

Description : A lamp has a source voltage of 110 volts and a current of 0.9 amps. What is the resistance of the lamp? A. 0.008 ohms B. 0.08 ohms C. 12.22 ohms D. 122.22 ohms

Last Answer : Answer: D

One method of testing for a reversed shunt field coil in a DC generator or motor is by connecting the field to a direct current source, at reduced field rated voltage, and test for polarity using a/an ____________. A. iron bar across each field B. magnetic compass placed near each field C. test lamp across adjacent fields D. copper jumper across the interpole connections

Description : One method of testing for a reversed shunt field coil in a DC generator or motor is by connecting the field to a direct current source, at reduced field rated voltage, and test for ... placed near each field C. test lamp across adjacent fields D. copper jumper across the interpole connections

Last Answer : Answer: B

Which of the following uses non-conventional Source of Energy? (1) Kerosene lamp (2) Wax candle (3) Solar lantern (4) Torch

Description : Which of the following uses non-conventional Source of Energy? (1) Kerosene lamp (2) Wax candle (3) Solar lantern (4) Torch

Last Answer : (3) Solar lantern

Three lamps are connected in parallel across a 120 Volt source. If one lamp burns out, the remaining two will ...

Description : Three lamps are connected in parallel across a 120 Volt source. If one lamp burns out, the remaining two will be: A. Glow dimmer B. Glow brighter C. Not light D. Glow with the same brightness as before

Last Answer : Glow with the same brightness as before 

Top and side views of a photographer’s setup for a product shoot are shown in the figure. P is the primary light source, S is the secondary light source, R is the reflector and Q is the camera position. If the Primary Light Source is at 100% intensity, and the secondary light is at 25% intensity, which one of the given options is the photograph taken using this setup?

Description : Top and side views of a photographer's setup for a product shoot are shown in the figure. P is the primary light source, S is the secondary light source, R is the reflector and Q is the camera ... 25% intensity, which one of the given options is the photograph taken using this setup?

Last Answer : D

When you sleep, do you need to have all the lights off or are you ok having the bedside lamp on or night light on in the hallway?

Description : When you sleep, do you need to have all the lights off or are you ok having the bedside lamp on or night light on in the hallway?

Last Answer : I can fall asleep with lights on, but I sleep much better, more solidly through the night, if it is completely dark. Lights on would never be on purpose, but rather falling asleep on the sofa or while watching ... , one on the DVR, and the DVR time was so bright we taped mesh over it to dull it.