What is meant by "exciting current" in a transformer?

1 Answer

Answer :

Exciting current is the current that flows in the primary of a  transformer with the secondary open (no load attached).

Related questions

Description : A large transformer operating at no load draws an exciting current Io of 5A, when the primary is connected to a 120 V, 60 Hz source. From a wattmeter test, it is known that iron losses are equal to 180 W. Calculate ... power absorbed by the core.  (A) 600 var (B) 572 var (C) 180 var (D) 360 var 

Last Answer : 572var

Description : What is meant is "transformer action"?

Last Answer : The transfer of energy from one circuit to another circuit by electromagnetic induction.

Description : What is exciting current?

Last Answer : A. Exciting current, when used in connection with transformers, is the current or amperes required for excitation. The exciting current on most lighting and power transformers varies from approximately 10% on small ... watts; the other is in the form of reactive power and is referred to as KVAR.

Description : The value of exciting or magnetizing current depends upon which of the following factors ? (a) Total m.m.f. required (b) The number of turns in the exciting winding (c) The way in which the winding is distributed (d) All of the above

Last Answer : (d) All of the above

Description : A separately excited generator as compared to a self-excited generator (a) is amenable to better voltage con-trol (b) is more stable (c) has exciting current independent of load current (d) has all above features

Last Answer : Ans: d

Description : What problem is caused by overcoupling in a transformer?

Last Answer : Low gain at the center frequency.

Description : What problem is caused in an rf amplifier by a loosely coupled transformer?

Last Answer : A too-narrow bandpass.

Description : Name the three power losses in a transformer

Last Answer : Copper-loss, eddy-current loss, and hysteresis loss

Description : Does 1:5 indicate a step-up or step-down transformer?

Last Answer : Step up.

Description : What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?

Last Answer : it causes K to be less than unity (I).

Description : The leads to the primary and the high-voltage secondary windings of a power transformer usually are of what color?

Last Answer : Primary leads-black; secondary leads red.

Description : What causes a voltage to be developed across the secondary winding of a transformer?

Last Answer : The magnetic lines generated by the current in the primary cut

Description : Does 1:5 indicate a step-up or step-down transformer?

Last Answer : Step up

Description : What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?

Last Answer : it causes K to be less than unity (I).

Description : What is the main reason for grounding the return side of the transformer to the chassis?

Last Answer : To eliminate shock hazard.

Description : In addition to stepping up or stepping down the input line voltage, what additional purpose does the transformer serve?

Last Answer : . It isolates the chassis from the power line.

Description : What is the main reason for grounding the return side of the transformer to the chassis?

Last Answer : Reduce the cost of manufacturing equipment.

Description : For what is the center tap on a transformer used?

Last Answer : Provides capability of developing two high-voltage outputs

Description : For what are the low voltage windings in a transformer used?

Last Answer : Filament voltage to the electron tubes.

Description : What are the purposes of the transformer in a power supply?

Last Answer : It couples the power supply to the ac line voltage, isolates the ac line voltage from the load, and steps this voltage up or down to the desired level.

Description : What is meant by diode ratings?

Last Answer : They are the limiting values of operating conditions outside which operations could cause diode damage.

Description : What is meant by the term "multipath"?

Last Answer : A term used to describe the multiple patterns a radio wave may follow.

Description : When referring to spectrum analyzers, what is meant by the term resolving signals?

Last Answer : The ability of the analyzer to discriminate between display signals of slightly different frequencies.

Description : What is meant by frequency deviation?

Last Answer : The difference between the carrier frequency of an fm signal and its maximum frequency excursion when modulated.

Description : What is meant by the coefficient of coupling?

Last Answer : The ratio of the fines of force produced by one coil to the lines of force that link another coil. It is never greater than one.

Description : What is meant by induced emf? By counter emf?

Last Answer : Induced emf is the emf which appears across a conductor when there is relative motion between the conductor and a magnetic field; counter emf is the emf induced in a conductor that opposes the applied voltage.

Description : With regard to computer logic circuits, what is meant by "complement?"

Last Answer : The opposite of the original statement.

Description : Would it be exciting for Americans to see once again White House press briefings now that Biden is President?

Last Answer : Well, I was excited and relieved last night just to read Heather Cox Richardson's account of yesterday's press briefing: Tonight, Press Secretary Jen Psaki held her first press briefing. ... will hold another press conference tomorrow, saying that Biden wants to bring truth and transparency back.

Description : If contacting dead people through seance is real would Steve Jobs be able to give Apple exciting new product ideas?

Last Answer : No. 1. Because “séances” only ever contact people who are in heaven, and Jobs is in Hell, because he could not get past the Gates. Or 2. Jobs was a Buddhist and and has already been reincarnated as a weed recurring periodically during rain season in the Gobi desert.

Description : Anything exciting today? On Christmas Day 2018?

Last Answer : Let me illustrate the day with a song

Description : What's new or exciting in your field?

Last Answer : AI driven, real time denoising of images and animations with minimum sampling.

Description : This birthday won't be very exciting right?

Last Answer : Well happy birthday. How old will you be?

Description : How could I cheaply have an exciting and creative group project?

Last Answer : Are you asking as a student or as a teacher? or other?

Description : Are you an interesting, exciting person living a boring, unimpressive life?

Last Answer : Um, yes? I suppose in my own mind anyway.

Description : Fluff time, which would you find more exciting to watch, two fat women Jell-O wrestling in a large wading pool, or two fat sumo wrestlers competing for a title?

Last Answer : Sumo wrestling is actually really fun to watch. Fat women, meh.

Description : Would you rather have a boring job that paid well but was not challenging, or an exciting job that only covered your basic expenses and was stimulating?

Last Answer : answer:Boring job that paid well. If I have money I can entertain myself perfectly well the 16 hours a weekday and 48 hour weekends. I never felt like I had to have a lot of fun' at work. I ... it because I was young and idealistic and had too much empathy for the kids. It was low paying, though!

Description : Are the dinner conversations at your table more likely to be boring or exciting?

Last Answer : My extended family has amazing after dinner conversations. We'll eat the meal and then sit there for hours and just talk about any subject you can think of. We spend hours with each other with no TV, ... our houses. Any good conversation isn't boring, but we don't go into too radical areas either.

Description : What did you find exciting as a child that you now find mundane?

Last Answer : I was fascinated by something very similar when I discovered that running my hands across our new carpet created balls of fluff out of nowhere.

Description : Why do you suppose that we find the transit of Venus exciting?

Last Answer : Personally, I have always been amazed at the accuracy of the predictions. (Plus I can finally use the word “ephemerides”.)

Description : Which is more exciting: college or pro football?

Last Answer : College football seemed more lively the times I watched it.

Description : How would you define a "class act" and do you have any exciting or inspirational examples?

Last Answer : Shackleton (your story reminded me)

Description : Do you find this new Spiderman teaser exciting?

Last Answer : answer:Confused… are they re-doing SM 1 with Toby Maguire?? Not good either way.

Description : What is new and exciting in computing?

Last Answer : I heard about something where you can contact anyone in the world, literally, some sort of inter-whada or something. Seems neato but I think all the computers might join together and try to kill us. As for now I’m off the to shop to get a chocolate malt and then head off to the roller rink

Description : What is your idea for a truly exciting, kick-ass video game?

Last Answer : answer:Your game sounds pretty damn awesome. I’d love that. Silent Hill Shattered Memories sort of has that theme, but it’s pretty boring and annoying…but yours and mine might make a pretty good game. :D

Description : What's the most exciting thing that's going to happen to you this year?

Last Answer : I am looking forward to someone buying our house so we can move

Description : Do you have any ideas for an exciting dinner I can cook my boyfriend for his birthday?

Last Answer : answer:Ingredients 2 cups freshly squeezed orange juice, about 6 oranges, orange rinds reserved 1 (5-pound) duck, cleaned, with innards, wing tips and excess fat removed 2 oranges, zested ⅔ cup sugar 1 ... 10 minutes. Pour the orange sauce in the pan into a gravy boat and serve with carved duck.

Description : What were all the exciting things you did for your 18th birthday?

Last Answer : Moved into my own apartment with a girlfriend.

Description : Tell me your most exciting true story.

Last Answer : answer:I met Beyonce in LaGuardia in 2001. She was wearing a Care Bears shirt and ordered double mayo on her Wendy’s burger. I saw her weave track and was disappointed that her hair wasn’t real. My super-hip indie-punk boyfriend was even more excited that I was. I need better stories.

Description : What is the most exciting thing thats happened to you?

Last Answer : answer:Hmm, there have been several. My top three are: Marrying my husband. Having my son. Finishing nursing school.

Description : Have you recently found anything new, cool or really exciting on the net?

Last Answer : I’m with you…nothing new, exciting and requiring forward thinking. But, maybe I just don’t “go out” enough.