What is field coils?
field coils generally refer to the electromagnetic coils on the stator ( the stationary part of an electric motor ). these generate the magnetic field(s) necessary to put the rotor ( the rotating part of the motor ) into motion.
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Answer . Do you maybe mean an 'iron core?' If so, an iron core strenghthens the magnetic field significantly.. If the coils are wound closer together the fluxlines are more dense and increase the strength of the field slightly (an iron core strengthens the field by allowing the magnetic field to… propagate inside it better than air). ( Full Answer )
Answer . it convers 12 volts into 50,000 volts . Coil in electronics means wire wrap around some media the get different uses in applications. The above answer only pertains to coil on a car I suppose It is part of the ignition system. in older cars, it is a single unit that is about the size of a… coke can. In many newer cars, you have individual coil packs sitting on top of each spark plug. ( Full Answer )
no the strength of the magnetic field does not decrease because of the number of coils increases.
What is a coil of wire usually wound around a core of iron or steel which produces a magnetic field when electricity flows through the wire?
An electro-magnet is th aswer.. Hey STOP CHEATING ON YOUR HOMEWORK AND CHECK OUT MY YOUTUBE! it is ........ http://www.youtube.com/nickjonasfan910
A coil of wire connected to a galvanometer When the coil is rotated in a magnetic field the galvanometer records a current The current results because?
The creation of electric current in a conductor moving in a magnetic field was discovered by Faraday in about 1825, but he didn't know why it happened. Fundamentally, it is due to the attraction/repulsion between the magnetic field and the free electrons in the conductor, so that when the conductor …moves it causes the electrons to move, which comprises the current. A similar effect can be obtained if the conductor is still and the magnetic field moves. These effects are the absolute fundamental reasons for being able to generate electricity using rotating machines, which are designed with different characteristics but all make use of the above physical facts ( Full Answer )
Why doesnt a field coil in a DC shunt motor lead to short ciruit when it is a fact that an INDUCTOR is a short circuit to DC?
Yes, an inductor is a short circuit to dc...that's true....IF the inductor is an ideal one, that is, the inductor has no resistance but has inductance only.. Anything in real world, as you know, is not ideal. An inductor is usually made of a copper wire. A copper wire has its own resistance. If an …inductor coil is thin and long (i.e. many turns), it will provide an appreciable resistance to DC, and will no longer be a short circuit. ( Full Answer )
If the magnetic field is fluctuating, or the coil of wire and magnetic field are moving with respect to each other, then a current is induced in the coil of wire. If the two are stationary and the magnetic field is stable, then no current is induced in the coil. However, if there is a current in …the coil, from another source, then the coil and the field will exhibit a relative force that will tend to move the coil with respect to the field. ( Full Answer )
Magnetic field strength in a coil can be measured from the equation :-F=I*B*L\nWhere,\nf=magnitude of Lorentz Force\nI=Current Flowing Through the Coil\nL=Length of the wire\nTHE UNIT MAGNETIC FIELD STRENGTH IS 'TESLA' or Weber per metre sq.
compressing a coil in a magnetic field means that there is arelative movement of the the said coil existing in a magneticfield, hence current will be induced. induction law. Another Answer 'Current' is not induced into a coil. It's voltage that's induced; if the coil forms a closed loop, t…hen current willflow; if there is no closed loop, then no current will flow. The induced voltage results from either a change in currentthrough the coil, or from the relative movement between thecoil and an external magnetic field. ( Full Answer )
Why are measurements of the magnetic field inside a rectangular coil not taken very close to the wires?
Self-answering. Most instruments for measure are made of metal, pherous or not, and would thereby be subject to the magnetic pull at present (as would any digital devices). Additionally, the rectangular nature of the coil would mean that there would be a concentration of magnetic force in the …corners, whereas a circular coil would be evely distributed. Also, any contact made with the wires would effectually "drain" the magnetism from the wires/coil and redirect it wherever the measuring device ordained (perhaps to your hand, though you may not even feel it; depending on how strong the magnet was). This is not to say that the magnet(s) would cease to be magnetic, but rather the(ir) pulling force would have a place to go, so to speak. Think static cling. ( Full Answer )
Coiling a wire increases the magnetic field of anelectromagnet because the magnetic field around a wire is circularand perpendicular to the wire. Each turn of the wire reinforces the field of the one next toit. The magnet field is strengthened. (I was in A+, too ;) ) - DawnAyers
Why if the same current flows in a wire coil and a single wire loop the magnetic field inside the coil is stronger than the field inside the loop?
why, if the same current flows in a wire coil and a single loop, the magnetic field inside the coil stronger than the field inside the loop
A solenoid. An electromagnet is wire wrapped around a core of iron (usually). The wrapped wire itself is called the solenoid.
Increasing the number of coils in a solenoid or an electromagnet will result in a stronger magnetic field.
If the coil encloses an iron rod, then the magnetic field strengthinside a current-carrying coil will be increased. This occursbecause the air path in the coil is made shorter by putting in therod. This in turn causes an increase in the field.
What condition will sinusoidal voltage be generated in a coil of wire that rotates in a magnetic field?
a generator or alternator,if the magnetic is permanent the currentproduced from the coil will be alternating current ac.
The strength of a magnetic field won't be directly proportional to the turns in the coil. It is more correct to say that field strength is directly proportional to current through the windings of the coil. There are some "limiting factors" that will not allow this to be a hard and fast rule, but… it is essentially correct. Answer Magnetic field strength (symbol: H ) is defined as the magnetomotive force per unit length of a magnetic circuit. As magnetomotive force is the product of the current flowing through a winding and the number of turns, then, yes, magnetic field strength is proportional to both the current and the number of turns -but this is ONLY true over the straight part of the magnetisation curve (i.e. before it goes into saturation). ( Full Answer )
A current circulating in a hollow copper coil (solenoid) produces a magnetic field equal to the permeability times the turns density times the current. B = Î¼ x n x I * B is the magnetic field measured in Tesla * Î¼ is the relative permeability of the solenoid's core which is air in this… example and have a value approximated to 1.25663706E-6 * n is the turns density which equals the number of turns divided by the solenoid length n = N/L where L is measured in meters. * I is the current flowing within the solenoid and measured in Amperes . ( Full Answer )
I think that the more coils and the greater amount of current, the bigger the magnetic field and the greater distance it can reach, but I am not sure so don't take my word for it.
The easiest way would be to increase the current flow. After that use thicker wire for the coil or add more turns.
Your question is unclear. If you are asking whether it produces a magnetic field, then yes it does. If you are asking what the coil is called, then it depends on the function of that coil -it could be a solenoid; it could be a transformer winding; it could be a generator's field winding; etc. You …really must learn to ask a proper question. ( Full Answer )
The combination of the magnetic field of a coiled wire wrapped around an iron core will create a very useful electromagnet. This is the bases used in the construction of mechanical relays.
These terms apply to the coils inside a wattmeter . 'Pressure coil' is an archaic term for 'voltage coil', which is connected in parallel with the supply, while the 'current coil' is connected in series with the load.
No, The magnet rotates/moves through the coil, inducing a current into the coil by disturbing the coils magnetic field. A transformer works the exact same way.
For a coil with electric current where is the energy associated with the magnetic field of the electric current stored?
The Magnetic field itself can do no work and is a byproduct of the electric current. The energy is stored in the current or provided by whatever drives the current.
What happens with the energy associated to the magnetic field of a coil with electric current if the electric current is turned off?
The magnetic field or energy associated with the magnetic field will no longer be generated if the current is turned off.
Yes. That is how it is done. Answer No, it's a voltage , not a current, that is generated.
The magnetic field in an electromagnet is created in the core of that device by the movement of current through the coil of wire around the core. For the electromagnet to be effective, the current must be moving in one direction only. If the current is reversed rapidly back and forth (like if AC is …applied), the electromagnet won't work. If the DC current simply undergoes a polarity change, the electromagnet will still work pretty much as well as it did, and that's that. Let's look just a bit further for the fun of it. If we wrap a coil of wire about a ferromagnetic core and run DC through it, it will act as an electromagnet. If we shut the current off, the magnetic field about the coil disappears. The core will lose most of its magnetism, but a little will remain, and this is what we call residual magnetism . If we reverse the DC and turn the power back on, the electromagnet will again be operating, but with a tiny bit of loss due to the fact that a little bit of the core material was magnetically polarized in the opposite direction. It's not a big deal, but it might be helpful in the future. The residual magnetism left in the core by the original direction of the current flow will detract slightly from the new magnetic field set up when the polarity of the applied voltage is reversed. The magnetic field in an electromagnet is created in the core of that device by the movement of current through the coil of wire around the core. For the electromagnet to be effective, the current must be moving in one direction only. If the current is reversed rapidly back and forth (like if AC is applied), the electromagnet won't work. If the DC current simply undergoes a polarity change, the electromagnet will still work pretty much as well as it did, and that's that. Let's look just a bit further for the fun of it. If we wrap a coil of wire about a ferromagnetic core and run DC through it, it will act as an electromagnet. If we shut the current off, the magnetic field about the coil disappears. The core will lose most of its magnetism, but a little will remain, and this is what we call residual magnetism . If we reverse the DC and turn the power back on, the electromagnet will again be operating, but with a tiny bit of loss due to the fact that a little bit of the core material was magnetically polarized in the opposite direction. It's not a big deal, but it might be helpful in the future. The residual magnetism left in the core by the original direction of the current flow will detract slightly from the new magnetic field set up when the polarity of the applied voltage is reversed. ( Full Answer )
A: A speaker has a magnet and the wire is suspended in a zone by a cone whereby +/- current will make the coil move up or down moving the coil and moving the cone causing air displacement as waves of pressure that our ears can detect as sounds in our brains.
Whenever a conductor passes through a magnetic field, a voltage ( not current!) is induced.
Would applying current through a coil which has a permanent magnet at its center increase the magnetic field from the magnet?
no. applying an electrical current to a coil wrapped around a magnet would create a force, which would move the magnet one way or another. to fully understand how to position coils and magnets to get the result you want, google the 'right hand thumb rule'
The current coil is one through which the current of source can pass. This coil is connected in series. The voltage coil is connected parallel to the applied voltage. In the current coil the quantity of current flowing is proportional to the current flowing in load while in the voltage coil, current… flowing is proportional to applied supply voltage. The voltage coil current is independent of current flow in load. For a complete understanding, please refer to a watt meter diagram. ( Full Answer )
What current should you pass through the coil to produce a net field in the center of the tank that has a dip angle of 62?
The answer to this question depends on many factors. These include what type of coil is being used, what solution is in the tank, what is the purpose of the activity and what the desired outcome may be.
A generator or alternator. If the magnetic field is permanent, the current produced from the coil will be alternating current. AC. Alternators usually work the other way round. The magnet is spun inside a coil of wire. The power is taken off from the stator. The rotor is an electromagnet, fed …via slip rings on the shaft. The strength of the magnet can be varied and controlled externally, to control the output voltage. ( Full Answer )
When a core is placed in the middle of the coil, the electromagnetism power of the coil will increase because the iron core is highly permeable.
yes, electric feilds do cause the magnetic feilds in the coils, this was first observed by Hans Oersted in 1819. He showed that when an electric current was passed theough a wire a nearby compass needle showed a deflection, this prooves that an electric feild causes an magnetic feild.
Will a coil experience a fluctuating magnetic field when placed near to the rotating slotted circular disc placed in front of a strong magnet?
Yes. In fact, this is how the original Hammond tone wheel organ, such as the B-3, worked.
Is it true that electrical energy is converted to magnetic field energy in the secondary coil and magnetic field energy converted to electrical energy at the primary coil?
yes it is the primary coil being somthing such as a tubine, and the secondary the generator
When a current carrying coil of water is running, creating an electric field, it is called a solenoid.
The strength of a magnetic field produced by a current carrying wire increases proportionately with the current through the wire, and it dies off as the distance from the wire decreases. To increase the magnetic field around a coil you would either increase the current running through it (by incr…easing the voltage and/or using a less resistive wire), increase the number of windings, or wind the coil more tightly (bring the windings closer together). The latter solution doesn't increase the overall magnetic flux produced, but it does make the coil more compact so the flux "leaks" less. ( Full Answer )
Magnetic fields are produced by electric currents , which can be macroscopic currents in wires and that The easiest way would be to increase the current flow. After that use thicker wire for the coil
Nothing because there has to be kInetic energy to convert to electrical energy therefore there is no charge not even a minus charge. Hope this helps, if it does Please recommend me it would be much approciated
Increase the turns or the current. Or both - within the limits of the apparatus!
Is you true the magnetic field around an electromagnet can be made stronger by increasing current or decreasing the number of coils around the iron core?
No, you is false. Increasing current does it, but the number ofturns in the coil also must increase if you want to increase themagnetic field that way.
What device changes mechanical energy to electrical energy by rotating a coil of wire through a magnetic field?
That's an electrical generator, whether the mechanical energy comesfrom steam or water flowing through a turbine, or wind, or tides.
A magnet made by passing electricity through a coil of wire iscalled an electromagnet. Just the coil of wire is not enough. Youalso need a coil the wire around a magnetizable metal such as ironor nickel to actually become magnetic.
What happens when you add more coils to the wire in an electromagnet what else can you do to increase the magnetic field of an electromagnet?
More turns would increase the magnetic induction and as currentflowing through increases then magnetic field induction tooincreases.
When coil is moved in a magnetic field in such a way that themagnetic flux linked with the coil gets changed then an emf i.e.electromotive force is induced in beween the ends of the coil
Two very common applications are to produce electricity as a generator, and to run on electricity as a motor.
It is the flow of ELECTRICITY that makes the field in a coil.Therefore a coil of any conductor will make a field. Silver is aconductor.