What is back emf?
Last Answer : Back EMF: When a current carrying conductor is placed in a magnetic field it experiences a force; when it moves due to the force it (conductor) cuts the magnetic field due to which an emf is ... (hence the applied armature voltage) is opposed by the induced emf which is therefore called as Back emf.
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Apr 27, 2020
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anonymous

Do AC induction motors have back EMF?
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Mar 15, 2018
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anonymous

What is back EMF of synchronous motor?
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Mar 15, 2018
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anonymous

What is back EMF in inductor?
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Mar 15, 2018
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anonymous

What is the back EMF in Transformers?
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Mar 15, 2018
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anonymous

What is the back EMF of a dc motor?
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Mar 15, 2018
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anonymous
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What is the back EMF of the motor?
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Mar 15, 2018
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anonymous

The back emf of synchronous motor depends on?
Last Answer : The back emf of synchronous motor depends on load angle.
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Mar 18, 2018
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anonymous

Last Answer : The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is 0.5.
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Mar 20, 2018
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anonymous

Last Answer : In case of D.C. shunt motors the speed is dependent on back e.m.f. only because flux is practically constant in D:C. shunt motors.
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Mar 20, 2018
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anonymous

Last Answer : The armature may burn if the back e.m.f. of a D.C. motor vanishes suddenly.
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Mar 20, 2018
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anonymous

Self induced emf and Mutually induced emf
Last Answer : (i) Self-induced e.m.f.: The e.m.f. induced in a coil due to the change of its own flux linked with it, is called self-induced e.m.f. (ii) Mutually induced e.m.f.: The e.m.f. induced in a coil due to the changing current in the neighbouring coil, is called mutually induced e.m.f.
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Aug 17, 2019
by
anonymous

What is Phase sequence? Draw waveforms of 3 phase emf.
Last Answer : Phase sequence: It is the order in which the three phases reach their peak or maximum values. It is shown in below fig. the phase sequence is A-B-C (or R-Y-B). In the following waveforms, it is ... 120º, B- phase voltage attains its positive maximum value. So the phase sequence is R-Y-B.
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Sep 7, 2018
by
anonymous

Compare statically induced emf with dynamically induced emf on any four points.
Last Answer : Statically induced emf Dynamically induced emf Emf is induced without any relative motion between conductor and magnetic field. Emf is induced due to relative motion between conductor ... induced in transformer windings e.g emf induced in Generator, Alternator armature windings
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Sep 4, 2018
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anonymous

Explain the term self induced EMF with a neat diagram.
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Aug 8, 2018
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anonymous

Define: 1) statically induced EMF 2) dynamically induced EMF Write the names of equipments in which these two types of EMF get induced
Last Answer : Concept of statically induced emf: The emf induced in coil or conductors without any relative motion between it and magnetic field is called statically induced emf. When conductor is stationary and flux ... it. This emf is dynamically induced emf. e.g. Emf induced in generators, alternator.
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Aug 8, 2018
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anonymous

List the two types of induced EMF.
Last Answer : There are two types of EMF one is statically induced EMF and second is dynamically induced EMF.
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Aug 8, 2018
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anonymous

Explain dynamic and static induced emf with neat diagram.
Last Answer : Dynamically Induced EMF:- In this case, either coil moves or magnet moves, so that there is relative motion between coil & magnetic field. Thus magnetic field is cut by coil & emf is induced in it. The emf ... The expression for induced EMF is e= -L(di/dt) or = -N(dϕ/dt).
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Apr 27, 2020
by
anonymous


The induced emf in the armature of a lap -wound four -pole dc machine having 100 armature conductors rotating at 600 rpm and with 1 Wb flux per pole is (1) 1000V (2) 100V (3) 600V (4) 10,000V
Last Answer : The induced emf in the armature of a lap -wound four -pole dc machine having 100 armature conductors rotating at 600 rpm and with 1 Wb flux per pole is 1000V
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Apr 29, 2018
by
anonymous

The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is (A) 2/3 (B) 5/6 (C) 7/8 (D) 6/7
Last Answer : The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is 6/7
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Apr 28, 2018
by
anonymous
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What is the EMF equation of the transformer?
Last Answer : E1 =2(3.142)fN1 (flux)1E2 =2(3.142)fN2(flux)2
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Dec 22, 2017
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anonymous

How can I apply a cream to my back where I can't reach?
Last Answer : I have found that I can reach more of my back with the back of my hand. Can you put some cream on the back of your fingers and try? Another idea is to buy a back scratcher that has a flat side and use it to apply the cream.
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Mar 5
by
anonymous

Do you have any ideas to bring back my parents back together?
Last Answer : All you can do is talk to them about your feelings. I would do it with each one individually. Then the rest is up to them if they want it. Even as a family member you don't know what the ... split them apart. It's a little hard to imagine that they would get back together after seven years. Hugs.
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Mar 1
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anonymous

Why does getting your back scratched feel so good?
Last Answer : I think it has something to do with our veins LOL
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Feb 27
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anonymous

How do you prevent chronic back pain from turning you into a bitter recluse?
Last Answer : I do yoga and then find a sunny window to meditate by!
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Feb 27
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anonymous

Is there such a thing as a truly comfortable futon that won't give you back problems?
Last Answer : My personal experience with futons has not been good. They have thin mattresses on hard wooden slats. What’s to love? Consider another type of bed or a couch/bed.
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Feb 27
by
anonymous
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I have a pain in my back right under my shoulder blade and when I move fast it hurts bad but if i move very slow its ok, what could that be?
Last Answer : It could be a lot of different things, ranging from easily dismissible to very serious. You don’t want to mess around or take half measures when it comes to your back – this may call for a doctor’s visit. A physical therapist could probably help you, too.
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Feb 27
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anonymous

IS it normal for my back to hurt more after beginning to see a chiropractor?
Last Answer : The only way to know for sure is to have a MD examine you and/or image your back. I love Chiropractors and I am very good friends with 3 in town, acquaintances with many more. Each practice ... assume for you. If it's fine then go back to the chiropractor. Luckily you have good health insurance.
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Feb 26
by
anonymous

Back Pain help?
Last Answer : my back pain was cured by a dr named john sarno. Google him and something called TMS. Tension myositis syndrome. Have an open mind. I’m living proof he cures.
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Feb 26
by
anonymous

How can men find it comfortable to sit on their wallet when it is in their back pocket?
Last Answer : Status symbol. We think you’re actually checking us out back there.
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Feb 26
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anonymous

How to Strengthen Your Lower Back
Last Answer : How to Strengthen Your Lower Back Your lower back is usually the most common body part taken for granted when working out. Most people concentrate more on their extremities and abdomen that they forget to ... lower ab exercises and as an addition, learn the Top 10 ways to stay motivated to exercise.
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How to Float On Your Back
Last Answer : How to Float On Your Back Floating on your back is usually one of the first tricks a new swimmer will learn. It's easy to see why: It doesn't involve paddling, kicking or anything extreme ... in place, you can start moving around by doing little flutter kicks to the direction you want to go.
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How to Back Dive
Last Answer : How to Back Dive Eager to impress your friends while having fun in the pool? Regular, forward dives are very common, so if you want to try something unique, you can do a back dive ... this new diving technique. Your friends will surely explode into applause as you perform a perfect back dive.
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How To Give a Back Massage
Last Answer : How To Give a Back Massage Nothing beats a soothing back massage after a stressful day in the office or exercising. This type of massage is ideal for those who would like to increase ... you can certainly provide comfort and relief with the right practice and application of the correct techniques.
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May 15, 2021
by
anonymous

Symptoms of Back Pain Causes And Tips
Last Answer : Symptoms of Back Pain Causes And Tips Back pain is the most common complaint heard among the adults these days. It has been estimated that people do suffer from back pain at least once in their ... night sleep that will recover from all the bodily disorders and you wake up fresh the next morning.
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Apr 13, 2021
by
anonymous

The counter e.m.f. of a d.c. motor?
Last Answer : The counter e.m.f. of a d.c. motor helps in energy conversion.
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Mar 26, 2018
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anonymous

Last Answer : E.m.f. of a Weston cell is accurately measured by electrostatic voltmeter.
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Mar 21, 2018
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anonymous

Last Answer : It is required to measure the true open circuit e.m.f. of a battery. The best device is D.C. potentiometer.
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Mar 21, 2018
by
anonymous

Last Answer : If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by Blv.
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Mar 20, 2018
by
anonymous

Last Answer : When the armature of a D.C. motor rotates, e.m.f. induced is back e.m.f.
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Mar 20, 2018
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anonymous

Why do I keep thinking about divorced parents?
Last Answer : Perhaps some of the ideas in this article will help you.
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Mar 1
by
anonymous

Could the Ibuprofen be making this difference?
Last Answer : answer:Could very well be. I live on ibuprofen.
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Feb 28
by
anonymous

How to deal with the problem of lumbar bone fusion?
Last Answer : Why would you want her not to get proper treatment? There is nothing aside from surgery that would fix bones fusing together.
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Feb 28
by
anonymous

What does Worker's Comp have to do with whether or not a doctor will treat you?
Last Answer : There are doctors specifically trained in Workers Comp procedures from what I understand. My husband got hurt on a job and could only go to one specific knee surgeon and he hated him (sub par idiot) so he had to request another. That’s what I got out of it, may not be right.
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Feb 28
by
anonymous

I can't loosen up this stiff neck. Any suggestions?
Last Answer : answer:Are you holding your breath and tense when getting a massage from the boyfriend? Try deep breathing and RELAX your body. Do this after a long hot bath, and also, try rolling your upper ... with hot water jets. You must be relaxed though. Achieving DEEP relaxation is key to muscle tension.
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Feb 27
by
anonymous

Herniated disc sufferers: what has worked for you?
Last Answer : Yoga. I am not telling you to ignore your doctors but they all failed me miserably and I needlessly suffered while they ordered more tests. 2 months later I was not better off until I found Yoga. In 3 ... of doctors and Chiro's could .I healed with Yoga. And 11 years later no pain what so ever.
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Feb 27
by
anonymous

Suddenly my shoulders hurt terrible, and burn! Any doctors in the house?
Last Answer : answer:I have no idea. Have you strained yourself lately? Maybe some sort of heartburn, or muscle spasms. I’d check with your doctor if the pain does not subside, or becomes worse in the next few hours. Maybe you are sprouting wings. lol
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Feb 27
by
anonymous

Is there a cure for Tietze Syndrome?
Last Answer : answer:It’s talking about shoving you around with a chiropractic “treatment.” Tietze’s syndrome, or costochondritis is a cartilage inflammation of your shoulder. Chiropractic won’t help, as it doesn’t help just about anything. Real treatments are found on the linked website.
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Feb 27
by
anonymous

What is good posture, and how does one maintain it?
Last Answer : answer:Good posture gives you height, gives the appearance of confidence, and I am thinking is better overall for back health. I have been losing my good posture from sitting and laying around too ... help with posture, most dance for that matter, along with demanding it of yourself in general.
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Feb 27
by
anonymous
