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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).
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∙ 2008-12-30 02:50:58
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What is the direction of magnetic field at the center of the coil?
the direction of magnetic field is straight at the centre of field line.
What is electro magnet induction?
When current travels through a conductor a magnetic field is generated around the conductor. If the current is AC the magnetic field will expand and collapse. If you wind the conductor into a coil the magnetic field will be stronger. Place a second coil close to the first, so that the magnetic field will expand and collapse across the second coil; a voltage 180 degrees out of phase with the source voltage will be induced into the second coil. If the current is DC the magnetic field will be constant and the second coil will have to be spun through the magnetic field to induce the voltage.
Why does an iron core increase the magnetic induction ofa coil of wire?
the magnetic domains that become aligned in the iron core contribute to the overall magnetic field of the coil and therefore increase its magnetic induction.
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.
Coil of wire that produces a magnetic field?
That is known by different names, including coil, and inductance.
What is coil linearity?
A variable linearity coil has a coil which is wound around a magnetic core, a permanent magnet for charging a bias magnetic field to the magnetic core, and a magnetic field adjusting coil for adjusting the bias magnetic field. The coil and the magnetic field adjusting coil are respectively disposed horizontally such that an axial line of each of the coils lies perpendicular to lead terminals to which terminal ends of each of the coils are connected. The coil, the magnetic field adjusting coil, and the permanent magnet may be contained in a casing and the terminal ends of each of the coil and the magnetic field adjusting coil are connected to lead terminals which are embedded into the casing
How current can be induced in a coil?
In 3 ways: By moving the coil in a magnetic field, by moving a magnetic field relative to the coil, or by supplying alternating current in a one coil and placing a second coil in the first's magnetic field. The first is the principle of the dynamo and the third the principle of the transformer.
What is the direction of magnetic field at the center of the coil?
the direction of magnetic field is straight at the centre of field line.
What is electro magnet induction?
When current travels through a conductor a magnetic field is generated around the conductor. If the current is AC the magnetic field will expand and collapse. If you wind the conductor into a coil the magnetic field will be stronger. Place a second coil close to the first, so that the magnetic field will expand and collapse across the second coil; a voltage 180 degrees out of phase with the source voltage will be induced into the second coil. If the current is DC the magnetic field will be constant and the second coil will have to be spun through the magnetic field to induce the voltage.
What happens when a coil wire is moved across the lines of a magnetic field?
When coil is moved in a magnetic field in such a way that the magnetic flux linked with the coil gets changed then an emf i.e. electromotive force is induced in beween the ends of the coil
How does a magnetic field affect a current carrying wire?
the magnetic fields around each coil of wire add together to form a stronger magnetic field inside the coil :)
What happens when a coil of wire cuts through a magnetic field?
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.
How does a magnet and voice coil work in a loudspeaker?
The coil has electricity applied to it by the amplifier. This makes it an electromagnet. It reacts with the static magnetic field of the magnet and moves the attached cone as the current varies.The magnet provides the constant magnetic field in which the varying magnetic field of the coil add to or subtracts from. The coil is connected to the speaker which varies according to the total magnetic field.
How can a change in voltage in a coil of wire be transferred to a neighboring coil of wire without physical contact?
When electric current flows through a coil of wire it generates a magnetic field. Variable current generates variable magnetic field. When a second coil is placed in a variable magnetic field of the first one an electric current is generated in it. Magnetic nature of the connection between two coils can be proved by the fact that it takes place only when the second coil is aligned with the magnetic field of the first one. Magnetic field of a coil can be traced with a compass.
What is the principle of a generator?
The scientific principle on which generators operate was discovered almost simultaneously in about 1831 by the English chemist and physicist, Michael Faraday, and the American physicist, Joseph Henry. Imagine that a coil of wire is placed within a magnetic field, with the ends of the coil attached to some electrical device, such as a galvanometer. If the coil is rotated within the magnetic field, the galvanometer shows that a current has been induced within the coil. The magnitude of the induced current depends on three factors: the strength of the magnetic field, the length of the coil, and the speed with which the coil moves within the field.In fact, it makes no difference as to whether the coil rotates within the magnetic field or the magnetic field is caused to rotate around the coil. The important factor is that the wire and the magnetic field are in motion in relation to each other. In general, most DC generators have a stationary magnetic field and a rotating coil, while most AC generators have a stationary coil and a rotating magnetic field.
Why there is an induce current in a coil when a coil is compressed in a magnetic field?
compressing a coil in a magnetic field means that there is a relative movement of the the said coil existing in a magnetic field, hence current will be induced. induction law.Another Answer'Current' is not induced into a coil. It's voltagethat's induced; if the coil forms a closed loop, then current will flow; if there is no closed loop, then no current will flow.The induced voltage results from either a change in current through the coil, or from the relative movement between the coil and an external magnetic field.
What is the purpose of the coil in a speaker?
The coil produces a magnetic field. When power is applied to the wire in the coil, the result is a magnetic charge. This magnetic charge is part of how the speaker produces sound.
