Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / john h
actually voltage through a conductor creates a magnetic
field in both cases AC's field are constantly building and
falling. A DC's voltage creates a constant magnetic field.
is the principle of electro magnet fields. A current is
induced in conductor as it cuts lines of flux. you run a DC
or AC though a coil of wire you still get a Electro
magnetic field.
If you place a peice of paper on your coil with some iron
filings and lightly agitate the paper the iron will display
your created lined of flux.
If you mean Cemf or Counter EMF then no dc will not produce
this. That requires AC. So the change in voltages AC
creates causes the building and colapsing of EMF to occur
as the lines of flux move through a conductor a current is
induced in a opposite direction to oppose current flow
creating your CEMF. which is why a inductor(a coil of wire)
causes a a 90 degree lag in wave forms.
If you would like to see this try putting a coil of wire
around some iron and place it close to a CRT TV. it
distorts the colors and picture with this ELECTROMAGNETIC
FIELD. do not do this to a TV you actually use it can
damage it. some CRT TVs and computer monitors may be
shielded from EMF.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
what is mean by kneepoint voltage? when it will happen? ( my doubt is, if CT secondary is open means ct get saturation or blas? what are factors are required for calculations? plz give currect anws:
what is the difference between general inverter and solor inverter clerly explain plz
How 48-relay (incomplete sequence) functions?
Which is the largest hydropower station in the world?
we specify current in case of feeder but in case of distributor voltage, why?
We have a distribution transformer of 750KVA/11kv/440v and an AVR (Servo Stabilizer) of 750KVA on the LT side of distribution transformer. Also we have an ACB of 1200A on the output of distribution transformer (that is on the input of AVR). We want to have an MCCB on the output of AVR. What should be the rating?
what is difference between earthingpits,earthing grid & earthing mess?
What is center gravity load in substation?
How to size fuse? How to size MCB?
dc supply given to dc generator winding.how is possible? my knowledge is saying the winding will burn. please reply.
why do we not use equivalent voltage source in negative sequence equivalent ckt.
In Generator How suction compression power and exhaust works ?
Why are cables rated for 40 KA for 0.25 Sec fault current rating?
What are all present producing cost of Per KWH of various Fuel?
how can calculate resistance box for 15 kw, 6 pole, RV-230, RA-42 motor
