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What occurs when an electric current is made by a changing magnetic field?
Wiki User
∙ 11y ago
We might call it induction, magnetic induction, or electromagnetic induction, depending on what kind of setup we were inspecting. It is the phenomenon of induction that allows a moving magnetic field to cause (induce) current flow in a conductor. A link can be found below for more information.
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoI think it is the other way round and that an electric current produces a magnetic field.
This is copied from KS3 bitsize:
Magnets and electric current - ElectromagnetsWhen an electric current flows in a wire it creates a magnetic field around the wire.
By winding the wire into a coil we can strengthen the magnetic field. Electromagnets are made from coils like this.
Making an electromagnet strongerWe can make an electromagnet stronger by doing these things:wrapping the coil around an iron core
adding more turns to the coil
increasing the current flowing through the coil.
Unlike bar magnets, which are permanent magnets, the magnetism of electromagnets can be turned on and off just by closing or opening the switch.
Wiki User
∙ 11y agoElectromagnetic induction.
Wiki User
∙ 11y agoElectromagnetic Induction
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What is galvanometer magnetic force and motor effect?
A motor effect is when magnetic flux lines interact with the current flow in the current conducting wire (a production of current means there is a production of a magnetic field, thus the magnetic field of a permanent magnet interacts with the magnetic field of the current), hence causing a motor effect, where electric energy is transformed into mechanical energy. In a galvanometer, the concept of the motor effect is used for it to detect and measure the magnitude of small electric currents as an instrument. A galvanometer uses radial magnets which cover more area of the rotor (this is where the needle is attached), as this rotor consists of an armature and loops of wire, it is perpendicular to the magnetic flux lines of the radial magnet. Therefore as the current flows through the coil, a magnetic field is produced, and the motor effect occurs allowing the needle to move on the scale.
Is a magnetic domain in everything?
No, magnetic domains are a phenomenon that only occurs in ferromagnetic materials.
An electric current occurs in a circuit when?
An electric current occurs in a circuit when a source of energy (or power, which is energy with a time factor) causes electrons to start slowly moving through the circuit at a speed of a few mm or cm per hour. This allows the quantity that we call charge to race through the circuit at a speed of roughly a million miles per hour, which is what we call electric current. Mathematically defined, electric current is the amount of charge which passes a given point in the circuit each second of time, I = Q/t .The source of energy or power can be as nearby as an energy cell or battery, or can be an electrical generating station located many miles away.
Earths magnetic poles reverse approximately every years?
The process of the reversal of the Earth's magnetic poles is called a magnetic flip. This occurs every 4 or 5 times per million years.
What occurs during the final stage of the CO2 car production?
You are changing the painting surface.
Why do magnets work?
Magnetic attraction occurs due to the effect of magnetic fields on electrical currents. An electric current would be the flow of electric charge (positive or negative depending on the amount of electrons present). A magnetic field is produced by moving electrical charges to effect other charges (basically).
Why does partial discharge create radio interference?
When discharge occurs, it means that charge moves, and that's a short lived electric current. Rapidly changing electric current causes radio interference, because of the electromagnetic field associated with it.
What is the energy transformation that occurs in an electric motor?
Electro-magnetic into kinetic.
Electromagnetic induction occurs in a coil when there is a change in?
Could you specify "coil"? Generally the electromagnetic induction occures due to variation of the B-field (magnetic flux density), variation of the current, I, or a change in the total area in which an electric current span over a B-field.
How is electricity and megnetisem related?
When a change occurs within a magnetic field there is an an electrical current present within a wire. As the electricity flows through the wire a magnetic field. The changing magnetic field creates a magnetic field. As this pattern continues these two fields induce each other through space.
Do all electromagnetic waves travel through empty spaces?
all of them. light, radio, gamma rays. it needs no medium. a magnetic disruption occurs and it collapses making an electric flux or current which makes a magnetic field. the field collapses and makes a flux or current which makes a magnetic field. and so it is theoretically forever and ever at the speed of light.
What is galvanometer magnetic force and motor effect?
A motor effect is when magnetic flux lines interact with the current flow in the current conducting wire (a production of current means there is a production of a magnetic field, thus the magnetic field of a permanent magnet interacts with the magnetic field of the current), hence causing a motor effect, where electric energy is transformed into mechanical energy. In a galvanometer, the concept of the motor effect is used for it to detect and measure the magnitude of small electric currents as an instrument. A galvanometer uses radial magnets which cover more area of the rotor (this is where the needle is attached), as this rotor consists of an armature and loops of wire, it is perpendicular to the magnetic flux lines of the radial magnet. Therefore as the current flows through the coil, a magnetic field is produced, and the motor effect occurs allowing the needle to move on the scale.
How can electric currents and magnets exert force on each other?
Electric currents and magnetic fields are by nature and by definition related to each other. In general, a magnetic field is created by the rotation of charge. If you imagine an electron following a circular path, a magnetic field would be created in the direction perpendicular to the plane of the circle.On the other hand, electric current is defined as the flow of charge. So, an electron flowing along a wire results in current flow. This also means that the electron following a circular path (as above) creates an electric current along that same path.If a circular flow of current results in a magnetic field perpendicular to the circle, what happens for current flow along a straight wire? Basically, we see a magnetic field which bends around the wire. Imagine exactly the reverse as before, with the magnetic field circling around the direction of current flow.This basic relationship between electric current and magnetic fields results in some interesting interactions:1. Many electromagnets work by the following principle: A coil of wire is made so that when voltage is applied the current will follow a circular path. As discussed above this circular movement of charge results in a magnetic field. In this case, you can imagine the direction of the magnetic field as the line through the center of the wire coil.2. The Hall Effect: When current is applied across a conductive slab and a magnetic field is applied perpendicular to current flow, a voltage is generated in the third perpendicular direction. This occurs due to the interaction of the magnetic field generated by the flow of current and the applied magnetic field.
Why would direct current be unsiutable for transformers?
A transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors-the transformer's coils. A varying current in the first or primary winding creates a varying magnetic flux in the transformer's core, and thus a varying magnetic field through the secondary winding. This varying magnetic field induces a varying electromotive force (EMF) or "voltage" in the secondary winding. This effect is called mutual induction.Transformers depend on the changing of magnetic fields within the transformer. Direct current would cause a magnetic field to form in the primary coil, but its the change that induces the current in the secondary field. the change only occurs if an alternating current is applied.
What energy transformation occurs when a current is placed in a magnetic field?
a sTRONG force Pulls WAVes ClOSeR.. s0 y3@h
What is saturation in magnetic materials?
saturation occurs when a magnetic material is as magnetized as it can get.
Conservative Nature of induced electric field?
The conservative nature of induced electric field is due to time varying magnetic fields. This occurs because the work done in moving a charge in a closed path in this field is not zero.
