Does ac current produce magnetic field?
Yes; any current produces a magnetic field, an AC current will produce an alternating magnetic field. If the current (and therefore the magnetic field) changes quickly, you may not be able to detect it with a compass needle, for example.
Moving a conductor through a magnetic field a voltage is induced in the conductor is called what type of induction?
Moving a conductor through a magnetic field will produce alternatinc current (AC).
AC current creates an alternating magnetic field, consistent with the alternating voltage. The only way I know of using AC current to create a constant magnetic field is to rectify the AC into DC and then use that DC to create the magnetic field.
the magnetic field would constantly change, that's why the AC current is converted to DC current
In an AC circuit it is the fluctuation of the sine wave which causes a varying magnetic field which in turn induces a current to flow in the secondary.
the ac generator works on the principle of ELECTROMAGNETIC INDUCTION. Whenever an electric current flows through a conductor, a magnetic field is immediately brought into existence in the space surrounding the conductor. It can be said that when electrons are in motion, they produce a magnetic field. The converse is also true i.e. when a magnetic field embracing a conductor moves relative to the conductor, it produce a flow of electrons in the conductor. This… Read More
Yes. Any current will produce a magnetic field. Note that such a field might be hard to detect, for example with a compass - since the AC current used in homes changes directions 50 or 60 times per second. Since this is much faster than the compass needle can follow, it will only show the average magnetic field, which is zero.
Is it necessary whenever there is an electric field there will be a magnetic field in perpendicular direction thus producing em waves if not what is the condition of em wave generation?
A moving charge (such as an electrical current) generates a magnetic field at right angles, true, but this field is stable and unchanging. An EM wave is only produced by a changing movement, for example an AC current. The condition would be that the field will change (and produce a wave) only if the current changes.
A current wire deflects a magnetic needle placed near it because the current wire is creating an electric field. If the current is supplied from an AC (alternating current source as opposed to DC which is direct current- AC would be from a wall socket, DC from a battery), then the current is constantly changing, so the electric field is constantly changing. A changing electric field results in a magnetic field perpendicular (90 degrees) to… Read More
There are more than one thing going on here, So note the sequence. 1) When ANY Current is supplied to a transformer, the current in the primary coil produces a magnetic field. 2) If ANY coil of wire "Sees" a changing magnetic field, it will produce current in the wires of that coil. 3) Now comes the magic. If the current in the primary coil is changing all the time, the magnetic field produced by… Read More
Why the output voltage from a transformer is zero if a direct current flows through the primary coil?
A transformer relies on AC current flowing through the primary to set up changing magnetic fields in the core. The field flows through the core and in to the secondary of the transformer, generating an AC current. The current must be AC, otherwise the magnetic field in the core of the transformer will saturate. In the same way, the armature of a dynamo or alternator must be moving in order to create a changing magnetic… Read More
A circuit is a path for charge particles -- it conducts current. An inductor, a circuit component, generates a magnetic field, when an AC is on. ======================
The field current is used for the excitation of generators. Answer You use DC current, because you want the resulting magnetic field to be constant. If you used AC, the resulting magnetic field would vary in both strength and direction.
A transformer doesn' t work with DC current because voltage is induced in the output winding of the transformer when a magnetic field passes through the coils of this winding. This happens with AC current because the magnetic field is continually expanding and contracting. With a DC current the magnetic field is unchanging other than when you first turn it on. Since the magnetic field is not moving it is not moving through the windings… Read More
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 current produced from the coil will be alternating current ac.
Setting aside the ideas of the B-field and Lorentz force and magnetic flux, a magnetic induction unit is any device that operates on principles of magnetic induction. Let's do a bit of review. Any time an electric current flows through a conductor, a magnetic field will appear around the conductor. A changing current, and alternating current (AC), will produce a changing electromagnetic field around the conductor. If this field passes through another conductor, if it… Read More
Electromagnetic induction is the process of inducing electric current in a coil with the help of a magnet. Whenever a conductor is moved through a magnetic field, or the magnetic field fluctuates in strength (as with an AC electromagnet), a current will be induced in that conductor. Induction cooktops work by passing a large AC current through a conductor under the cooktop, creating a fluctuating magnetic field which induces an electric current through the cookware… Read More
The key is that the magnetic field in the transformer has to change. As the AC input voltage rises, the magnetic field builds up, as the voltage falls back to zero, the magnetic field collapses. The change in field strength is what induces the voltage in the secondary. DC current is constant, it does not vary with time.
The AC - and it must be AC - in the primary coil generates an alternating magnetic field around the coil; this alternating magnetic field induces a current in the secondary.
Basis of transformer is change in current. Whenever current flows it causes magnetic field. Current flow in primary coil causes magnetic field around secondary. Since current is changing as in the case of AC, magnetic filed also changes. As per Faraday's law change in magnetic field causes induced voltage at secondary coil. In case of DC there wont be any change in current, thus no change in magnetic field leading to no induced voltage.
Because of how a transformer works. Basically a transformer have a primary and a secondary winding sitting close to each other, with the primary connected to the ac source. Pushing ac through the primary wionding creates a pulsating magnetic field. Pushing a pulsating magnetic field through the secondary winding creates an electric current in it. That current will also be ac, but dependent on the number of turns in the windings it will have another… Read More
That would depend if the conductor were carrying an AC current or a DC current.
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… Read More
A transformer works by induction. A magnetic field that builds up or collapses induces a current in a coil that is inside the field. For this you need the current that creates the field to turn of and on i.e. alternating current. Direct current would create a static magnetic field and just one pulse of induced electricity in the secondary coil (at the moment the direct current was introduced to the primary coil) then nothing… Read More
What is the difference in the direction of the magnetic field produced around conductor by dc flow and ac flow?
The direction and amplitude of the magnetic field around a wire depend on the direction and amplitude of the current through the wire. When the wire carries DC, the direction and amplitude of the current in the wire are constant, so the direction and amplitude of the magnetic field around the wire are constant. When the wire carries AC, the direction of the current in the wire is periodically reversing and its amplitude typically changes… Read More
First understand that every electrical conductor (wire) with current flow through it will produce an invisible magnetic field around it. This field is directly proportional to the magnitude of current flowing. Second (and inversely) realize that any conductor moving through a magnetic field will produce a voltage, And if provided with a complete circuit (a path to flow in) will result in current flow in that conductor. The movement can be from the conductor moving… Read More
Yes. An electric current is surrounded by a magnetic field, and this will affect a compass. Please note that this is more noticeable in the case of DC - for AC, the current changes all the time, it changes very quickly, and the AVERAGE value of the magnetic field is zero.
An alternator works on magnetic fields. A revolving magnetic field or conductor, induces AC current by crossing the magnetic field. The induced AC current is converted to DC by a rectifier which uses diodes to sent positive electricity to one side and negative to the other. A regulator which is usually part of the rectifier is used to sent out the twelve volts used to power your vehicle
Electric current produce magnetic fields. However, in the case of AC (alternating current, usual in households), the current changes so quickly (and the current has an average value of zero) that I am not sure the effect on a compass would be visible to the naked eye. Electric current produce magnetic fields. However, in the case of AC (alternating current, usual in households), the current changes so quickly (and the current has an average value… Read More
The rotor of an alternator need a DC voltage applied to it to generate a magnetic field, this magnetic field will generate the AC power in the AC windings.The AVR(Automatic Voltage Regulator) is regulating this DC voltage so that the magnetic field is strong enough to maintain the output AC voltage. As soon as more current is drawn from the output, this output voltage will drop and a stronger magnetic field is needed to sustain… Read More
A generator produces electricity by moving wires through a magnetic field. The direction of the induced current is dependent upon the direction in which the wire crosses the magnetic field. In a generator the magnetic field is usually fixed - and the wires are spinning through it. So: Visualize a horizontal magnetic field. The axis of rotation of the wires is perpendicular to the field. Any given wire will be cutting up through the field… Read More
A simple AC generator works via a magnetic field. There is voltage induction into a coil of wire within the magnetic field, and as the voltage increases, the magnetic field increases.
An electrical field generates a magnetic field in nearby metals - wrapping a piece of magnetic material in electrically conductive wire then passing current through it will generate a magnetic field. An easy way to do this is to wrap coated copper wire around an iron core. With DC current the field is either on (pulling) of off (not pulling), with AC current the field is generated and removed multiple times per second - each… Read More
An alternator is just another name for a synchronous generator. Excitation is needed to create a magnetic field in the rotor. When to rotor is spun with excitation the magnetic field will cut through the stator field and produce an AC voltage in the stator field. In terms of an alternator with built in rectifier the stators AC voltage in the rectified to DC. The strength of excitation will determine the alternators output voltage. The… Read More
AC Generators, auto alternators. All rotating field generators produce AC. To get direct current form a generator, a diode bridge must be used.
when ever you have a changing current, you create a magnetic field. All house hold appliances that draw AC power (plug into the wall) create magnetic fields, some obviously more than others.
yes. If current is flowing through a wire, the magnetic field is around the wire, like your fingers would be around the wire if you gripped it. If the current was alternating (AC) the field would collapse and expand in time with the alternations. One of nature's mysteries - to me anyway.
transformers increase or decrease voltage. converters have rectifiers inside, which change ac to dc Transformers are devices that operate on the change in magnetic field, That change in magnetic field only induces an AC voltage/current into the secondary winding. From there it must be rectified to obtain DC, and is very often filtered to make it usable.
Edison and Tesla came to technological blows in the late 1800s when Tesla's AC (alternating current) power systems that are used all over the world today came into competition with Edison's DC (direct current) power systems. As it turns out, Tesla's system was the better one. In 1882, Serbian inventor Nikola Tesla identified the rotating magnetic induction field principle used in alternators and pioneered the use of this rotating and inducting electromagnetic field force to… Read More
An AC current in one coil of the transformer, causes a changing magnetic field around it. The changing magnetic field induces an AC voltage in the second winding. The strength of the magnetic field is intesified by a soft iron core. The output of the secondary coil is dependent on the number of windings. More windings will give a higher voltage, than the primary input voltage and vice versa.
Ceiling fan is a Single phase Induction motor. Generally we use a capacitor start &Run AC Motor for ceiling Fans. Motor principle: whenever current carrying conductor is placed in a magnetic field-it experiences force. Stator: supplied by 1-phase voltage, current will produce in the stator winding-so magnetic field. But AC motor needs a rotating magnetic field in order turn the motor shaft (fan blades). This is done by applying voltage with different phases to different… Read More
By increasing the field current (current flowing through the rotor windings), the magnetic field generated by these windings will increase. This increased magnetic field will result in a larger current flow in the stator windings (the output of the generator). This in turn causes a larger pull against the rotation of the rotor, causing it to slow down. The governor will then kick in, allowing more steam/ power to the prime mover to keep speed… Read More
yes, ac or dc current it doesn't matter current is flowing through the coil(its also an conductor) so magnetic field around coil so flux exist
Unclear what it is you are trying to protect but if you are attemtping to reduce Arc Blow.. start by using AC welding current.
It becomes an inductor. These are used to smooth out AC current. Also a magnetic field flows through the center of the coil.
Faraday's law : If a "conductor" is placed in a "magnetic field" the movement in either conductor or field produces an induced emf in the conductor. In generator the produced torque will be in AC(alternating current) so commutator or slip rings is used to produce unidirectional torque required for production of Direct Current. Basically by Faraday law the produced torque will be always bidirectional, for alternator the bidirectional torque can be used directly. for DC… Read More
Electricity is generated when a piece of conductive metal (such as copper) is passed through a magnetic field (or if the magnetic field is moved around the metal). A generator will have a copper wire in the center, surrounded by a magnet shaped like a torus (donut shaped, wire is in the hole in the middle). The wire is stationary. Electricity is generated when the magnet is spun (moving the magnetic field around the wire)… Read More
What is generated when a permanent magnet is moved in front of a coiled wire and the magnet's magnetic field pushes and pulls electrons in the coiled wire?
an AC, or alternating current
maglev train works on alternating current..The electric current supplied to the coils in the guideway walls is constantly alternating to change the polarity of the magnetized coils. This change in polarity causes the magnetic field in front of the train to pull the vehicle forward, while the magnetic field behind the train adds more forward thrust.
Rather than turning the wire, it needs to move through a magnetic field. Unless the magnet has infinite length, it will need to come back again, or form part of a coil, which turns within the field. I think the answer you are looking for is AC, (Alternating Current). This is because as the coil turns inside the magnetic field, it first cuts the field one way and then the other as part of its… Read More
when ac passes through a conductor, the field produced is an electric field