116. Lux meter is used to measure…… a) Illumination level c) Harmonics b) Sound intensity and illumination level d) Speed

Lux meter is used to measure…… a) Illumination level c) Harmonics b) Sound intensity and illumination level d) Speed
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Illumination level

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Lux meter is used to measure…… a) Illumination level b) Sound intensity and illumination level c) Harmonics d) Speed

Description : Lux meter is used to measure…… a) Illumination level b) Sound intensity and illumination level c) Harmonics d) Speed

Last Answer : Illumination level

Lux meter is used to measure…… c) Illumination level c) Harmonics d) Sound intensity and illumination level d) Speed

Description : Lux meter is used to measure…… c) Illumination level c) Harmonics d) Sound intensity and illumination level d) Speed

Last Answer :  Illumination level

______ meter is used to measure Illumination level a. Pyrometer b. Wattmeter c. Lux meter d. All

Description : ______ meter is used to measure Illumination level a. Pyrometer b. Wattmeter c. Lux meter d. All

Last Answer : Ans:- c. Lux meter

Lux is the SI unit of - (1) intensity of illumination (2) luminous efficiency (3) luminous flux (4) luminous intensity

Description : Lux is the SI unit of - (1) intensity of illumination (2) luminous efficiency (3) luminous flux (4) luminous intensity

Last Answer : (1) intensity of illumination Explanation: The SI unit of intensity of illumination (illuminance) is the lux. An illuminance of 1.0 lux is produced by 1.0 lumen of light shining on an area of 1.0 m2.

Which apparatus is used to measure the intensity of light? (1) Lux meter (2) Calorimeter (3) Anemometer (4) Altimeter

Description : Which apparatus is used to measure the intensity of light? (1) Lux meter (2) Calorimeter (3) Anemometer (4) Altimeter

Last Answer : Lux meter

As per IRC recommendations, the average level of illumination on important roads carrying fast traffic is (A) 10 Lux (B) 15 Lux (C) 20 Lux (D) 30 Lux

Description : As per IRC recommendations, the average level of illumination on important roads carrying fast traffic is (A) 10 Lux (B) 15 Lux (C) 20 Lux (D) 30 Lux

Last Answer : Answer: Option D

What is the recommended minimum range of illumination required by BS EN 970 for inspection of a welded surface? a) 90 to 125 lux b) 150 to 250 lux c) 350 to 500 lux d) 35 to 50 lux

Description : What is the recommended minimum range of illumination required by BS EN 970 for inspection of a welded surface? a) 90 to 125 lux b) 150 to 250 lux c) 350 to 500 lux d) 35 to 50 lux

Last Answer : c) 350 to 500 lux

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

A 500 W bulb fitted with a reflector illuminates an area of 2 m x 2 m with an average illumination of 500 lux.

Description : A 500 W bulb fitted with a reflector illuminates an area of 2 m x 2 m with an average illumination of 500 lux. The efficiency of the reflector is 50%. The efficiency of the bulb in lumens/watt is : 

Last Answer : A 500 W bulb fitted with a reflector illuminates an area of 2 m x 2 m with an average illumination of 500 lux. The efficiency of the reflector is 50%. The efficiency of the bulb in lumens/watt is : 8

SI unit of luminous intensity is ______. (1) lumen (2) lux (3) candela (4) watt

Description : SI unit of luminous intensity is ______. (1) lumen (2) lux (3) candela (4) watt

Last Answer : (3) candela Explanation: Luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a ... the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd).

State the use of Lux Meter and Tachometer in energy audit.

Description : State the use of Lux Meter and Tachometer in energy audit.

Last Answer : Use of lux meter – to measure intensity of light Use of tachometer – to measure speed

An electric bulb illuminates a plane surface. The intensity of illumination on the surface at a point 2m away from the bulb is `5 xx 10^(-4)` phot. Th

Description : An electric bulb illuminates a plane surface. The intensity of illumination on the surface at a point 2m away from the bulb is `5 xx 10^(-4)` phot. Th

Last Answer : An electric bulb illuminates a plane surface. The intensity of illumination on the surface at a point 2m away from the ... ? (1 phot `= 1m//cm^(2))`.

At what distance form a light source of 64 cd, will the intensity of illumination because 4 flux ?

Description : At what distance form a light source of 64 cd, will the intensity of illumination because 4 flux ?

Last Answer : At what distance form a light source of 64 cd, will the intensity of illumination because 4 flux ?

Calculate the intensity of illumination at a distance of 0.5m from a source of light of power 200 candela assuming normal incidence.

Description : Calculate the intensity of illumination at a distance of 0.5m from a source of light of power 200 candela assuming normal incidence.

Last Answer : Calculate the intensity of illumination at a distance of 0.5m from a source of light of power 200 candela assuming normal incidence.

Quality of a musical note depends on – (1) Fundamental frequency (2) Amplitude of the wave (3) Harmonics present (4) Velocity of sound in the medium

Description : Quality of a musical note depends on – (1) Fundamental frequency (2) Amplitude of the wave (3) Harmonics present (4) Velocity of sound in the medium

Last Answer : (3) Harmonics present Explanation: Sound "quality" or "timbre" describes those characteristics of sound which allow the ear to distinguish sounds which have the same pitch and loudness. Timbre is mainly ... and the attack-decay envelope of the sound. Harmonic content is the most important of these.

Quality of a musical note depends on (1) Fundamental frequency (2) Amplitude of the wave (3) Harmonics present (4) Velocity of sound in the medium

Description : Quality of a musical note depends on (1) Fundamental frequency (2) Amplitude of the wave (3) Harmonics present (4) Velocity of sound in the medium

Last Answer :  Harmonics present

Enlist the luminaries used in factory lighting and lux level required in various areas.

Description : Enlist the luminaries used in factory lighting and lux level required in various areas.

Last Answer : Area Luminaries Lux level Office building Fluorescent tube, LED, CFL 500 lux Testing centre Fluorescent tube, LED, CFL 400 to 500 lux Workshop/work place Halogen ... , LED, CFL, Projector lamp, filament lamp, Halogen Lamp, Metal Halide lamp etc Above 600 Lux

The speed of sound in air at sea level is approximately------? A. 300 meter per second B. 320 meter per second C. 340 meters per second (Answer) D. 370 meter per second

Description : The speed of sound in air at sea level is approximately------? A. 300 meter per second B. 320 meter per second C. 340 meters per second (Answer) D. 370 meter per second

Last Answer : C. 340 meters per second (Answer)

Decibel is used to measure the intensity of - (1) Magnetic field (2) Sound (3) Light (4) Heat

Description : Decibel is used to measure the intensity of - (1) Magnetic field (2) Sound (3) Light (4) Heat

Last Answer : (2) Sound Explanation: The decibel (dB) is used to measure sound level, but it is also widely used in electronics, signals and communication.

X and y are two trains of length 500m and 400m run on parallel lines. When they run in the same direction it will take 60 sec to cross each other. When they run in opposite direction, it will take 20 sec to cross each other. Find the speed of 2 trains (in km/hr) A) 116 and 42 km/hr B) 54 and 78km/hr C) 104 and 60km/hr D) 108 and 54km/hr

Description : X and y are two trains of length 500m and 400m run on parallel lines. When they run in the same direction it will take 60 sec to cross each other. When they run in opposite direction, it will take 20 sec to cross each ... ) A) 116 and 42 km/hr B) 54 and 78km/hr C) 104 and 60km/hr D) 108 and 54km/hr

Last Answer :  ANSWER : D Explanation:  Let the speed of 2 trains be a1 and a2  Total distance covered to cross each other = (500 + 400)m  = 900m  When they run in the same direction,  Relative speed = a1 - a2  = 900 /60 ... hr  a 2= (15 * 18 / 5)m/s  = 54km/hr  Speed of two trains are 108 and 54 km/hr

i have a blood glucose level of 116 is that high ?

Description : i have a blood glucose level of 116 is that high ?

Last Answer : i have a blood glucose level of 116 is that high

Knot is a measure of – (1) The speed of ship (2) The curvature of spherical objects (3) Solar radiation (4) Intensity of earthquake shock

Description : Knot is a measure of – (1) The speed of ship (2) The curvature of spherical objects (3) Solar radiation (4) Intensity of earthquake shock

Last Answer : (1) The speed of ship Explanation: The knot (pronounced not) is a unit of speed equal to one nautical mile (1.852 km) per hour, approximately 1.151 mph. There is no standard abbreviation but km is commonly used. The knot is a non-SI unit accepted for use with the International System of Units (SI).

Knot is a measure of (1) The speed of ship (2) The curvature of spherical objects (3) Solar radiation (4) Intensity of earthquake shock

Description : Knot is a measure of (1) The speed of ship (2) The curvature of spherical objects (3) Solar radiation (4) Intensity of earthquake shock

Last Answer : The speed of ship

How can you measure your level of intensity during physical activity?

Description : How can you measure your level of intensity during physical activity?

Last Answer : Take your heart rate or pulse.

Decibel is the unit of ______. (1) Speed of light (2) Intensity of sound (3) Intensity of heat (4) None of these

Description : Decibel is the unit of ______. (1) Speed of light (2) Intensity of sound (3) Intensity of heat (4) None of these

Last Answer : (2) Intensity of sound Explanation: Decibel (dB) unit is used for expressing the ratio between two amounts of electric or acoustic power for measuring the relative loudness of sounds.

Decibel is the unit used for – (1) Speed of light (2) Intensity of heat (3) Intensity of sound (4) Radio wave frequency

Description : Decibel is the unit used for – (1) Speed of light (2) Intensity of heat (3) Intensity of sound (4) Radio wave frequency

Last Answer : (3) Intensity of sound Explanation: The decibel (abbreviated dB) is the unit used to measure the intensity of a sound. The decibel scale is a little odd because the human ear is incredibly ... of a physical quantity (usually power or intensity) relative to a specified or implied reference level.

Decibel is the unit used for (1) Speed of light (2) Intensity of heat (3) Intensity of sound (4) Radio wave frequency

Description : Decibel is the unit used for (1) Speed of light (2) Intensity of heat (3) Intensity of sound (4) Radio wave frequency

Last Answer : Intensity of sound

Water flow to a terminal 3 mm diameter and has an average speed of 2 m/s. What is the rate of flow in cubic meter/mm?  a. 0.0001m³/min  b. 0.076 m³/min  c. 0.085 m³/min  d. 0.097 m³/min

Description : Water flow to a terminal 3 mm diameter and has an average speed of 2 m/s. What is the rate of flow in cubic meter/mm?  a. 0.0001m³/min  b. 0.076 m³/min  c. 0.085 m³/min  d. 0.097 m³/min

Last Answer : 0.085 m³/min

A bayabas falls from a branch 5m above the ground with what speed in meter per second does it strike the ground assume g = 10m/s².  a. 11m/s  b. 12m/s  c. 13m/s  d. 10m/s ∫KE = mV2/2gc

Description : A bayabas falls from a branch 5m above the ground with what speed in meter per second does it strike the ground assume g = 10m/s².  a. 11m/s  b. 12m/s  c. 13m/s  d. 10m/s ∫KE = mV2/2gc

Last Answer : 10m/s

The approximate intensity level of the sound which can caused damage to the ear drum is _____? A. 100 dB B. 60 dB C. 160 dB D. 20 dB

Description : The approximate intensity level of the sound which can caused damage to the ear drum is _____? A. 100 dB B. 60 dB C. 160 dB D. 20 dB

Last Answer : ANSWER: A

What sound intensity corresponds to a sound-intensity level of 50dB? A. 1 x 10-6W/m2 B. 1 x 10-7W/m2 C. 1 x 10-8W/m2 D.1 x 10-5W/m2

Description : What sound intensity corresponds to a sound-intensity level of 50dB? A. 1 x 10-6W/m2 B. 1 x 10-7W/m2 C. 1 x 10-8W/m2 D.1 x 10-5W/m2

Last Answer : B. 1 x 10-7W/m2

For the safety and comfort of factory workers, the sound-intensity level in a certain factory must remain below 85 dB. What is the maximum sound intensity allowed in this factory? A. 3.2 x 10-4 W/m2 B. 3.2 x 10-6 W/m2 C. 3.2 x 10-10 W/m2 D. 3.2 x 10-3 W/m2

Description : For the safety and comfort of factory workers, the sound-intensity level in a certain factory must remain below 85 dB. What is the maximum sound intensity allowed in this factory? A. 3.2 x 10-4 W/m2 B. 3.2 x 10-6 W/m2 C. 3.2 x 10-10 W/m2 D. 3.2 x 10-3 W/m2

Last Answer : A. 3.2 x 10-4 W/m2

A choir consisting of 36 individuals all of whom can sing with the same intensity. A soloist sings a certain passage and then is joined by the remainder of the choir members for a repeat of the passage. What is the difference in the sound intensity level in the two cases? A. 3 dB B. 6 dB C. 36 dB D. 15.6dB

Description : A choir consisting of 36 individuals all of whom can sing with the same intensity. A soloist sings a certain passage and then is joined by the remainder of the choir members for a repeat of the passage. What is the ... sound intensity level in the two cases? A. 3 dB B. 6 dB C. 36 dB D. 15.6dB

Last Answer : D. 15.6dB

Sound intensity level is ________. A. 10 log I/I(ref) B. 10 log I(ref)/I C. 30 log I/I(ref) D. 20 log I/I(ref)

Description : Sound intensity level is ________. A. 10 log I/I(ref) B. 10 log I(ref)/I C. 30 log I/I(ref) D. 20 log I/I(ref)

Last Answer : A. 10 log I/I(ref)

ECE Board Exam March 1996 A car horn outdoors produces a sound intensity level of 90 dB at 10 ft away. At this distance, what is the sound power in watt? A. 12 W B. 0.12 W C. 0.012 W D. 1.2 W

Description : ECE Board Exam March 1996 A car horn outdoors produces a sound intensity level of 90 dB at 10 ft away. At this distance, what is the sound power in watt? A. 12 W B. 0.12 W C. 0.012 W D. 1.2 W

Last Answer : C. 0.012 W

The approximate intensity level of the sound which can cause damage to the ear drum is? A. 20 dB B. 60 dB C. 100 dB (Answer) D. 160 dB

Description : The approximate intensity level of the sound which can cause damage to the ear drum is? A. 20 dB B. 60 dB C. 100 dB (Answer) D. 160 dB

Last Answer : C. 100 dB (Answer)

How many watts is a 200 lux LED bulb equivalent to?

Description : How many watts is a 200 lux LED bulb equivalent to?

Last Answer : Still variable since I’ve seen CFLs of the same wattage (both actual draw and “incandescent equivalent”) be rated for different lux/lumens.

Lux Soap The first When In the market Come on ?

Last Answer : 1925 In Lux Soap The first In the market Comes . References: Wikipedia

What do you think about the program called f.lux?

Description : https://justgetflux.com/ Is it really worth anything, helps you fall asleep?

Last Answer : answer:

What is the marketing mix of lux soap?

Description : What is the marketing mix of lux soap?

Last Answer : good position

How much is a Alberto lizzi la Tosca de-lux accordion made in Germany worth?

Description : How much is a Alberto lizzi la Tosca de-lux accordion made in Germany worth?

Last Answer : What is the answer ?

(3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the latin lux, meaning "light", and generally implies radiance, gloss, or brilliance. Metals in general have high electrical conductivity, high thermal conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Description : (3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word ... conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Last Answer : Cloud is a colloidal dispersion of – (1) Air in a dispersion medium of water (2) Fog in a dispersion medium of water (3) Mist in a dispersion medium of air (4) Water drops in a dispersion medium of air

The SI unit of luminous emittance is - (1) Lux (2) Candela (3) Lumen (4) Lumen second

Description : The SI unit of luminous emittance is - (1) Lux (2) Candela (3) Lumen (4) Lumen second

Last Answer : (1) Lux Explanation: The lux is the SI unit of illuminance and luminous emittance, measuring luminous flux per unit area. It is equal to one lumen per square metre. In photometry, this is used as a ... of the intensity, as perceived by the human eye, of light that hits or passes through a surface.

The SI unit of luminous emittance is : (1) Lux (2) Candela (3) Lumen (4) Lumen second

Description : The SI unit of luminous emittance is : (1) Lux (2) Candela (3) Lumen (4) Lumen second

Last Answer : Lux

What is speed of sound in meter per second?

Description : What is speed of sound in meter per second?

Last Answer : The speed of sound is dependent on the temperature and not onthe air pressure. At 20 degrees celsius the speed of sound is 343m/s.

The speed of sound is _____. A. 300 meter per second B. 315 meter per second C. 340 meter per second D. 362 meter per second

Description : The speed of sound is _____. A. 300 meter per second B. 315 meter per second C. 340 meter per second D. 362 meter per second

Last Answer : ANSWER: C

The speed of sound is _____. A. 300 meter per second B. 315 meter per second C. 340 meter per second D. 362 meter per second

Description : The speed of sound is _____. A. 300 meter per second B. 315 meter per second C. 340 meter per second D. 362 meter per second

Last Answer : ANSWER: C

Which instrument are used for intensity of the earthquakea) Richter scale b) Seismometers c) Seismograph d) Tilt meter

Description : Which instrument are used for intensity of the earthquake a) Richter scale b) Seismometers c) Seismograph d) Tilt meter

Last Answer : b) Seismometers

Harmonics What ?

Last Answer : AC Power Of the system Original Frequency In addition Different Different Frequency Prominent AC Wave Creation Is Him Harmonics Says.

What do you mean by harmonics?

Description : What do you mean by harmonics?

Last Answer : Definition for a harmonic is-a sinusoidal component of a periodic wave or quantity having a frequency that is an integral multiple of the fundamental frequency. The main sources of ... as they may cause overheating of capacitors and nearby generators and interfere with telecommunication systems.