Enlist any four advantages of induction heating.
Last Answer : Advantages of Induction heating https://youtu.be/RcdH_74VJz0
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2 answers
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Jul 30, 2019
by
anonymous

The range of frequencies used in induction heating is : (A) 0-25 Hz (C) less than 200 Hz (B) 50 to 100 Hz (D) more than 1 kHz
Last Answer : The range of frequencies used in induction heating is : more than 1 kHz
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100 views
1 answer
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Apr 29, 2018
by
anonymous

Is induction heating safe?
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64 views
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Mar 11, 2018
by
anonymous
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State the material used for making (1) Magnetic Core (2) Fuse element
Last Answer : The material used for making of: (1) Magnetic Core : Iron, cobalt, Nickel, CRGO, HRGO , silicon steel (2) Fuse Element: Tin- lead wire, Tinned copper wire
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209 views
1 answer
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May 7, 2020
by
anonymous

The magnetic susceptibility of paramagnetic material is: A) Less than zero B) Less than one but positive C) Greater than one D) Equal to zero
Last Answer : The magnetic susceptibility of paramagnetic material is: Less than one but positive
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229 views
1 answer
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Jun 18, 2018
by
anonymous

The property of a material which opposes the creation of magnetic flux in it is known as?
Last Answer : The property of a material which opposes the creation of magnetic flux in it is known as reluctance.
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2.0k views
1 answer
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Mar 25, 2018
by
anonymous

In a magnetic material hysteresis loss takes place primarily due to?
Last Answer : In a magnetic material hysteresis loss takes place primarily due to it high retentivity.
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409 views
1 answer
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Mar 25, 2018
by
anonymous

A material for good magnetic memory should have?
Last Answer : A material for good magnetic memory should have high retentivity.
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167 views
1 answer
asked
Mar 25, 2018
by
anonymous

Explain hysteresis loss, eddy current loss and skin effect limitations with reference to magnetic material.
Last Answer : Hysteresis loss: Hysteresis loss is a loss which occurs due to the friction of magnetic domain due to the change in magnetic field in ferromagnetic material like iron. Hysteresis loss causes power loss ... loss in transformer is given by, We=Kef2Kf2Bm2watts Skin effect limitations:
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719 views
1 answer
asked
Feb 16, 2018
by
anonymous

Electro Magnetic Induction
Last Answer : Electro Magnetic Induction
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129 views
1 answer
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May 5, 2020
by
anonymous

_______ is used for heating non -conducting materials. (1) Eddy current heating (2) Arc heating (3) Induction heating (4) Dielectric heating
Last Answer : Dielectric heating is used for heating non -conducting materials.
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2.7k views
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Apr 30, 2018
by
anonymous

Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Last Answer : Parts Insulating Materials Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils. ... Transformer bushings Porcelain Insulation between transmission line and pole. Porcelain
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199 views
1 answer
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May 7, 2020
by
anonymous

State advantages of electric heating over other types of heating methods.
Last Answer : Advantages of Electric heating over the other types of heating methods: 1. It can be put into service immediately. 2. No standby losses. 3. High efficiency. 4. More economical ... low attention and supervision. 14. Protection against overheating can be provided by suitable switch gear.
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303 views
2 answers
asked
Aug 17, 2019
by
anonymous

Last Answer : https://youtu.be/fgQTs-1hq7Q
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71 views
1 answer
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Mar 19, 2020
by
anonymous

Two non -inverting amplifiers, one having a unity gain and the other having again of twenty are made using identical operational amplifiers. As compared to the unity gain amplifier, the amplifier with gain twenty has
Last Answer : Two non -inverting amplifiers, one having a unity gain and the other having again of twenty are made using identical operational amplifiers. As compared to the unity gain amplifier, the amplifier with gain twenty has less bandwidth
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128 views
1 answer
asked
Apr 29, 2018
by
anonymous

Measurement of a non -electrical quantity involves the following four subsystems: a) amplifier block b) display block c) instrumentation block d) transducer block The correct, sequence in which these block occur is (1) d,a,c,b (2) d, c, a, b (3) a, c, b, d (4) a, b, c, d
Last Answer : Measurement of a non -electrical quantity involves the following four subsystems: a) amplifier block b) display block c) instrumentation block d) transducer block The correct, sequence in which these block occur is d,a,c,b
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96 views
1 answer
asked
Apr 29, 2018
by
anonymous

What is a non linear load?
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60 views
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Mar 10, 2018
by
anonymous

Why do non linear loads cause harmonics?
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94 views
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Mar 10, 2018
by
anonymous

Can underfloor heating be installed under the wooden floor ?
Last Answer : Under-floor hydronic or steam heat can certainly be installed underneath wooden floors. I have personally installed one instance of hydronic (hot water) heat system under wooden flooring, and have demolished ... heat, but I have visited such places on many occasions and found them very comfortable.
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1 view
1 answer
asked
Feb 27
by
anonymous

What is the best cost effective way to use central heating.
Last Answer : no don’t close the doors. The air needs to recycle itself, so you need proper circulation. close vents in rooms you don’t use and use directional vents pointing down (winter months) in the rooms you do. One last thing, make sure you have a clean filter.
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0 views
1 answer
asked
Feb 14
by
anonymous

How to Install Baseboard Heating
Last Answer : How to Install Baseboard Heating If you have a small apartment or room that you want to heat in an efficient manner, one effective method is by using electric baseboard heating. Installing it yourself might seem ... these steps and you're sure to have a cozy and warm indoor area, all the time.
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8 views
1 answer
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May 14, 2021
by
anonymous

How to Make a Heating Pad ?
Last Answer : A heating pad is a very important item to have around in the household. Whether it's a headache, menstrual cramps or other pains, a heating pad would make for a great help. This heating pad is also made ... is that there are a myriad of ways we can use for things that we think are no longer useful.
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3 views
1 answer
asked
May 5, 2021
by
anonymous
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How to install autonomous heating?
Last Answer : Autonomous heating and hot water supply is gaining popularity and is used not only in winter, but also in summer. The reason for this, as a rule, is large bills from utilities, as well as the ... a boiler, you should not save on the reliability of the boiler, on control equipment and on service.
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6 views
1 answer
asked
Mar 30, 2021
by
anonymous

The frequencies and voltage used in Dielectric heating are (A) 10 – 30 MHz, upto 25 kV (B) 50 – 60 Hz, upto 25 kV (C) 10 – 30 MHz, upto 100 V (D) 50 – 60 Hz, 110 V – 230 V
Last Answer : The frequencies and voltage used in Dielectric heating are 10 – 30 MHz, upto 25 kV
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118 views
1 answer
asked
Apr 28, 2018
by
anonymous

Last Answer : In order that current should flow without causing excessive heating or voltage drop, the relay contacts should have low contact resistance, be clean and smooth, be of sufficient size and proper shape.
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152 views
1 answer
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Mar 19, 2018
by
anonymous

What is meant by resistance heating?
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72 views
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Mar 11, 2018
by
anonymous

What is meant by dielectric heating?
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84 views
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Mar 11, 2018
by
anonymous

Did you realize the double standards here at fluther?
Last Answer : Not to sound bossy; but Take a deep breath, turn off your computer, go for a walk around the block, when you get back take a long hot bath & then go to bed. Tomorrow morning will be a new day ... won't seem so major. I've lost 10 pounds since joining Fluther from my walks around the block!!! LoL
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1 view
1 answer
asked
Mar 2
by
anonymous

Magnetic and Non-magnetic Materials
Last Answer : We have now looked at a number of ways in which matter can be grouped, such as into metals, semi-metals and non-metals; electrical conductors and insulators, and thermal conductors and insulators. ... information must be stored, in computers and TV's, as well as in generators and electric motors.
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44 views
1 answer
asked
Jan 6, 2021
by
anonymous

Define magnetic permeability. State and explain the factors affecting permeability of magnetic materials
Last Answer : Permeability : The capability of the magnetic material to conduct the magnetic flux is known as permeability. Permeability and hysteresis loss are inversely related to each other. Factors ... impurities affect the geometric pattern of the crystals and are harmful to the magnetic property.
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216 views
1 answer
asked
Aug 5, 2019
by
anonymous

What arc the errors occurring in measuring devices due to stray magnetic field and temp '? Explain how to compensate them.
Last Answer : 1. Error due to stray magnetic fields- Main magnetic field gets disturbed by external magnetic fields known as stray magnetic fields. 2. Compensation technique To avoid this error, ... resistance alloy having a negligible resistance temp coefficient in the ratio of 1:10 for pressure coil
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170 views
1 answer
asked
Sep 6, 2018
by
anonymous

Explain magnetic effect employed in measuring instrument.
Last Answer : Magnetic Effect: I) In PMMC meters: ➢ When a current is passed through a conductor, magnetic field is produced round the conductor. Due to this field when current ... field it experiences a mechanical force. Examples: Electrodynamometer type instruments, Induction type instrument.
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194 views
1 answer
asked
Sep 6, 2018
by
anonymous

Define the following terms: i) Magnetic flux density, ii) Reluctance, iii) Magneto-motive force, iv) Permeance.
Last Answer : (i) Magnetic flux density (B): It is the magnetic flux per unit area measured at right angles to the flux path. (Its unit is weber/m2 or tesla). (ii) Reluctance: It is the ... flux to set up through it and it is reciprocal of reluctance. Permeance = 1/ Reluctance. Unit: weber/ampere.
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719 views
1 answer
asked
Sep 4, 2018
by
anonymous

Derive an expression for energy stored in a magnetic field .
Last Answer : Expression for energy stored in a magnetic field: The energy is stored in magnetic field when current increases and return back when the current decreases. At instant t' seconds after closer of switch ... energy absorbed by the magnetic field when current increases from 0 to I amperes
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271 views
1 answer
asked
Sep 4, 2018
by
anonymous

What is magnetic hysteresis? What is the cause of hysteresis?
Last Answer : Magnetic hysteresis: When a magnetic material is subjected to cycle of magnetization, it is found that flux density (B) in the material lags behind applied magnetizing force (H). This ... the movement of orientation, due to which the flux density lags behind the magnetic field intensity.
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77 views
1 answer
asked
Sep 4, 2018
by
anonymous

Define magnetic lines of force. Also draw and show magnetic lines of force of a bar type magnet.
Last Answer : Magnetic Lines of force- These are the imaginary lines (having no physical existence) introduced by Faraday for the pictorial representation of the distribution of a magnetic field. OR A line of ... that the tangent at any point gives direction of the resultant force at that point.
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95 views
1 answer
asked
Sep 4, 2018
by
anonymous

Classify magnetic materials and explain in brief.
Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { ... the absence of external magnetic field. Following are the ferromagnetic materials: Iron, Cobalt, Nickel.
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288 views
1 answer
asked
Sep 4, 2018
by
anonymous
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Compare electric and magnetic circuit.
Last Answer : Comparison between Magnetic and Electric Circuits
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401 views
5 answers
asked
Aug 8, 2018
by
anonymous

Define magnetic circuit. Draw simple series magnetic circuit.
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70 views
0 answers
asked
Aug 8, 2018
by
anonymous

Give the relation between magnetic field strength, magnetic flux density and permeability.
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84 views
0 answers
asked
Aug 8, 2018
by
anonymous

Define magnetic flux density and state its formula.
Last Answer : The magnetic flux per unit area is called as magnetic flux density. Magnetic flux density is denoted by B. The formula for magnetic flux density is Weber per metre square or Tesla. Mathematically ... the unit of magnetic flux density is Weber per metre square which is also called as Tesla.
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128 views
1 answer
asked
Aug 8, 2018
by
anonymous

Define magnetic field strength and state its unit.
Last Answer : Magnetic field strength is the force experienced by a unit N-pole when placed at any point in a magnetic field is known as magnetic field strength or magnetizing force. Magnetising force or magnetic field ... unit of length is metre. So the unit of magnetic field strength is ampere turns per metre.
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109 views
1 answer
asked
Aug 8, 2018
by
anonymous

Define magnetic lines of force. Show the magnetic lines of force for bar type magnet.
Last Answer : Magnetic linens of force is the imaginary lines for magnetic field of magnet around it. These magnetic lines of forces are introduced by Michael Faraday. The direction of lines of force is from N-pole to S-pole. The figure shows lines of force for bar type magnet.
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102 views
1 answer
asked
Aug 8, 2018
by
anonymous

Magnetic circuit breakers use _________ A) Permanent magnets B) Earth magnets C) Solenoid D) All the above
Last Answer : Magnetic circuit breakers use Solenoid
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115 views
1 answer
asked
Apr 29, 2018
by
anonymous

Which of the following is a unit of magnetic flux? A) Weber B) Maxwell C) Both A and B D) None of these
Last Answer : Which of the following is a unit of magnetic flux? A) Weber B) Maxwell C) Both A and B D) None of these
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103 views
1 answer
asked
Apr 29, 2018
by
anonymous

What is the SI unit for magnetic reluctance? A) Ampere B) Ampere-turns per weber C) Henry D) None of these
Last Answer : What is the SI unit for magnetic reluctance? A) Ampere B) Ampere-turns per weber C) Henry D) None of these
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347 views
1 answer
asked
Apr 29, 2018
by
anonymous

Which of the following laws relates the magnetic field to the magnitude, direction, length, and proximity of the electric current? A) Lenz’s law B) Faraday’s law C) Biot–Savart law D) None of these
Last Answer : Which of the following laws relates the magnetic field to the magnitude, direction, length, and proximity of the electric current? A) Lenz’s law B) Faraday’s law C) Biot–Savart law D) None of these
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86 views
1 answer
asked
Apr 29, 2018
by
anonymous

The magnetic permeability of a diamagnet is _________ A) More than that of vacuum B) Same as that of vacuum C) Less than that of vacuum D) 3.14 times that of vacuum
Last Answer : The magnetic permeability of a diamagnet is Less than that of vacuum
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86 views
1 answer
asked
Apr 29, 2018
by
anonymous

The magnetic neutral plane shifts in a dc machine (A) in the direction of motion of motor (B) in the direction of motion of generator (C) due to increase in the field flux (D) cause reduction of flash over between commutator segments
Last Answer : The magnetic neutral plane shifts in a dc machine in the direction of motion of generator
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162 views
1 answer
asked
Apr 28, 2018
by
anonymous

Those magnetic materials are best suited for making armature and transformer cores which have____permeability and_______hystersis loss.
Last Answer : Those magnetic materials are best suited for making armature and transformer cores which have high permeability and low hystersis loss.
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300 views
1 answer
asked
Mar 25, 2018
by
anonymous
