Can you help by answering this question?

What is the use of power factor correction?

28 views
in Digital Instrumentation by
What is phosphorescence and fluorescence?

Your answer

Thanks for your contribution. Feel free to answer this question. Please avoid short answer. Your answer is most welcome. Be genuine.

Upload image or document:

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
Are you a robot ? (Y = Yes / N = No)
To avoid this verification in future, please log in or register.

1 Answer

0 votes
by
Fluorescence is the light produced when the source of energy is applied. The light produced after the removal of source of energy is known as phosphorescence.

Related questions

2 answers 32 views
1 answer 36 views

What is logic analyser?

asked May 6, 2018 in Digital Instrumentation by Shimroz123
1 answer 34 views

What is digital storage oscilloscope (DSO)?

asked May 4, 2018 in Digital Instrumentation by Shimroz123
1 answer 46 views

What is measurement error ?

asked Jan 7, 2018 in Digital Instrumentation by Quiz
0 answers 29 views

In a sample-and-hold circuit, the aperture time is (A) time required following a sample (B) time required for the switch to open (C) transition time interval between sample and hold (D) time from the hold command to the opening of the switch 

asked Jun 4, 2018 in Digital Instrumentation by Shimroz123
1 answer 16 views

In D/A converter, the resolution required is 50mv and the total maximum input is 10v. The number of bits required is   (A) 7 (B) 8 (C) 9 (D) 200

asked May 17, 2018 in Digital Instrumentation by Shimroz123
1 answer 23 views

What are the types of error?

asked May 6, 2018 in Digital Instrumentation by Shimroz123
1 answer 25 views

What are the factors influencing measurement errors?

asked May 6, 2018 in Digital Instrumentation by Shimroz123
1 answer 19 views

What are the SI derived units?

asked May 6, 2018 in Digital Instrumentation by Shimroz123
1 answer 30 views

What are the seven base units?

asked May 6, 2018 in Digital Instrumentation by Shimroz123
1 answer 49 views

what are the advantages of digital multimeter ?

asked Aug 18, 2017 in Digital Instrumentation by Zeeshan
0 answers 392 views

Enlist the different modes of operation of electronic counters and explain any two modes in details.

asked Mar 2, 2018 in Digital Instrumentation by Quiz
0 answers 42 views

Explain the basic dual slope ADC technique used in digital multimeters with its diagram and measurement cycle.

asked Mar 2, 2018 in Digital Instrumentation by Quiz
0 answers 20 views

Describe the various blocks and their functions in pipelined ADC architecture.

asked Mar 2, 2018 in Digital Instrumentation by Quiz
1 answer 16 views

Number of comparators required for an 8 bit flash ADC is: (1) 8 (2) 16 (3) 255 (4) 256

asked May 22, 2018 in Digital Instrumentation by Shimroz123
1 answer 12 views

In a particular circuit connection, AWG 18 wire is selected over AWG 22. The reason is that it is having

asked May 14, 2018 in Digital Instrumentation by Shimroz123
1 answer 28 views

Which is the fastest type of analogue to digital converter?

asked May 4, 2018 in Digital Instrumentation by Shimroz123
1 answer 29 views

The vertical deflection of an electron beam on the screen of a CRO is measured to be 8 mm. Now, the potential difference between the Y-plates is doubled, and simultaneously the pre-accelerating anode voltage is reduced to half of its previous value. Then, the vertical deflection of the beam on the screen would become (A) 64 mm (B) 32 mm (C) 8 mm (D) 1 mm

asked Apr 28, 2018 in Digital Instrumentation by Shimroz123
1 answer 18 views

The operation of a ramp type Digital Voltmeter is based on the principle of (A) Voltage-to-current conversion. (B) Voltage-to-time conversion. (C) Current-to-time conversion. (D) Current-to-frequency conversion.

asked Apr 28, 2018 in Digital Instrumentation by Shimroz123
1 answer 21 views

The ADC having highest conversion speed is (A) Dual-slope ADC (B) Successive approximation ADC (C) Flash ADC (D) Servo ADC

asked Apr 28, 2018 in Digital Instrumentation by Shimroz123
1 answer 19 views
1 answer 13 views

How many non-overlapping channels are available in IEEE 802.11b

asked May 23, 2018 in Digital Instrumentation by Shimroz123
1 answer 12 views

Choose the correct statement  (a) Digital multimeters are built using current measuring elements, while analog multimeters are built using voltage measuring units (b) Digital multimeters are built using voltage measuring units, while analog multimeters are built using current measuring units (c) Both digital and analog multimeters are built using voltage measuring units (d) Both digital and analog multimeters are built using current measuring units

asked May 15, 2018 in Digital Instrumentation by Shimroz123
1 answer 13 views

An analog voltmeter has a sensitivity of 10kΩ/volt. The galvanometer used in constructing the instrument will produce a full scale deflection when the current passed through it is  (a) 10 mA (b) 20 mA (c) 50 mA (d) 100 μA

asked May 15, 2018 in Digital Instrumentation by Shimroz123
1 answer 11 views

An optical fiber cable laid underground has developed a discontinuity at a distance d from the source end. The fault can be located using the instrument  (a) Optical spectrum Analyzer (OSA) (b) Optical Time Domain Reflectometer (OTDR) (c) Optical Power Meter (OPM) (d) Laser Diffractometer (LD)

asked May 15, 2018 in Digital Instrumentation by Shimroz123
1 answer 10 views

Two sinusoidal signals of the same frequency are displayed on a dual-trace oscilloscope. One complete cycle of each signal covers 6 cm of the horizontal scale and the starting point of the horizontal scale and the starting point of the two signals are separated by 0.5 cm. The phase difference between the two signals in degrees is  (a) 30 (b) 45 (c) 60 (d) 90

asked May 15, 2018 in Digital Instrumentation by Shimroz123
1 answer 18 views

Transient signals can be observed using  (a) storage oscilloscope (b) sampling oscilloscope (c) wave analyzer (d) spectrum analyzer

asked May 15, 2018 in Digital Instrumentation by Shimroz123
1 answer 11 views

The trace on an oscilloscope continually moves to the right of the screen when  (a) the sweep is triggered. (b) the sweep period is larger than the signal period. (c) the sweep period is smaller than the signal period. (d) there is no weep.

asked May 15, 2018 in Digital Instrumentation by Shimroz123
1 answer 8 views

In a dual trace oscilloscope, the display appears segmented when  (a) low frequency signals are observed in Alternate mode (b) low frequency signals are observed in Chop mode (c) high frequency signals are observed in Alternate mode (d) high frequency signals are observed in Chop mode

asked May 15, 2018 in Digital Instrumentation by Shimroz123
1 answer 7 views

To distinguish between signals having very close values, we need an instrument with  (a) high accuracy (b) high resolution (c) high sensitivity (d) high linearity

asked May 15, 2018 in Digital Instrumentation by Shimroz123
1 answer 14 views

In a weighted-resistor digital-to-analog converter with 8-bit input, if the resistance corresponding to the MSB is 2K, what will be the resistance corresponding to the LSB?  (a) 250 Ω (d) 512 KΩ (c) 256 KΩ (d) 25.5 Ω

asked May 15, 2018 in Digital Instrumentation by Shimroz123
1 answer 11 views

ESD stands for

asked May 14, 2018 in Digital Instrumentation by Shimroz123
1 answer 22 views

Very small displacements are effectively measured using

asked May 14, 2018 in Digital Instrumentation by Shimroz123
1 answer 9 views

Y –axis in a CRO normally represents

asked May 14, 2018 in Digital Instrumentation by Shimroz123
1 answer 30 views

Which type of ADC gives high resolution?

asked May 4, 2018 in Digital Instrumentation by Shimroz123
1 answer 18 views

Gross errors occur in measurements because of (A) disturbances about which we are unaware. (B) human mistakes. (C) inherent shortcomings in the instrument. (D) loading effects on the meters.

asked Apr 28, 2018 in Digital Instrumentation by Shimroz123
0 answers 32 views

Explain frequency domain synthesis. Which techniques fall into the category of frequency domain synthesis?

asked Mar 2, 2018 in Digital Instrumentation by Quiz
0 answers 359 views

Write short notes on:  1) Phosphor characteristics  2) Liquid crystal display

asked Mar 2, 2018 in Digital Instrumentation by Quiz
0 answers 39 views

Explain the basic operation of an oscilloscope with necessary diagram for each section in detail.

asked Mar 2, 2018 in Digital Instrumentation by Quiz
0 answers 26 views

Discuss DAC architectures based on resistor ladders.

asked Mar 2, 2018 in Digital Instrumentation by Quiz
1 answer 24 views

Describe the basic SHA operation with the help of its four mode specifications.

asked Mar 2, 2018 in Digital Instrumentation by Quiz
2 answers 61 views

Standard Commands for Programmable Instruments (SCPI)

asked Aug 25, 2017 in Digital Instrumentation by Zeeshan
2 answers 46 views

Asymmetric Digital Subscriber Line (ADSL)

asked Aug 25, 2017 in Digital Instrumentation by Zeeshan
1 answer 32 views

Spectrum analyzer

asked Aug 9, 2017 in Digital Instrumentation by Zeeshan
2 answers 35 views

Oscilloscope

asked Aug 9, 2017 in Digital Instrumentation by Zeeshan
1 answer 30 views

Time Domain Reflectometry (TDR)

asked Aug 9, 2017 in Digital Instrumentation by Zeeshan
2 answers 55 views

Integrating or Dual Slope ADC

asked Aug 9, 2017 in Digital Instrumentation by Zeeshan

Welcome to electronics2electrical.com here you can ask questions related to electrical, electronics, mechanical, telecommunication, instrumentation, computer, mathematics, physics etc.
Be respectful to all the members. Do not copy and paste the answers from other websites which have copyright content. While asking question give full details about it.

Categories

Most popular tags

power motor dc circuit transformer voltage current used system phase resistance factor synchronous load ac energy induction electric generator series frequency between speed capacitor use electrical meter line difference control type mosfet transmission magnetic plant high single instrument bjt unit source advantages function diode and machine winding field define torque parallel amplifier supply shunt thyristor motors electricity arduino maximum time relay armature problem value on transformers types coil diagram state flow ratio material three formula starting direction theorem method emf operating efficiency digital wave microprocessor test instruments inductance loss measure operation connected signal low applications effect single-phase network temperature working constant losses different law wattmeter measuring compare controlled breaker drive device logic rc full switch flux wire resistivity disadvantages free of materials machines angle force converter conductor transistor gain open protection scr core measurement number bridge principle generators reactance circuits negative the friction iron loop short pole battery conservation steam resistors hysteresis computer using analog lines secondary station gate a rectifier inverter linear induced relays nuclear capacitance basic characteristics design direct work rotor electronics ammeter forces diesel damping rlc connection factors capacitors minimum insulation moving regulation running self systems air fault range main stability quality starter igbt eddy alternator ideal rl average 3-phase plants arc thermal error fuzzy biasing dielectric pressure balanced superposition errors copper rotation feedback impedance measured electronic electrons charge inductive transfer explain start off back curve over solar is three-phase tariff locomotive peak bias zener engineering commutator surge conductors rating universal potentiometer density permanent mechanical transducer capacity memory adc excitation two fuse pure harmonics application semiconductor inductor internal pmmc reaction welding resonance traction permeability breakers rms designed electromagnetic si generation brushes switching capacitive shaded rate 1 distribution resistor methods delta star oscillator reluctance simplification algebra 8085 boolean weston dynamometer insulating strength installation definition fuel heating earth units

8,503 questions

7,101 answers

134 comments

3,090 users

...