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Is it true or false that any magnetic field induces an emf in a loop of wire If true give a proof if false explain it?
Waterspraay
Yes it is true it is used in Transformers and it works with alternating current and direct but if direct then it only produces it for a very short time. Not sure why it happens cause i am only gcse but I am sure if you look up transformers then you will find out how they work.
Wiki User
∙ 11y ago
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What happens to the magnitude of a magnetic field if the electric field that induces it increases the rate at which it changes?
The magnitude of the magnetic field is decreased
Passing a magnetic field by a wire creates a what?
Passing a wire near a magnetic field induces an electric current in the wire.
What is the dual nature of electromagnetic waves and how they travel in a vacuum and through a medium?
electromagnetic waves can be regarded either as particles (photons) or as waves. An electromagnetic wave is composed of an electric field wave and a magnetic field wave. As the electric field collapses it induces a magnetic field which induces an electric field that opposes the first one. That electric field induces a magnetic field and so forth. Each field induces the next. It's rather more complex than that but you'd have to get into Maxwell's equations and Pointing vectors to get closer to the truth.
What happens when a rod of iron enters a magnetic field?
It induces an electrical current
Explain the difference between permanent and electromagnetic magnets?
In an electric magnet there is an ordinary metal used which when you run a current through it, induces a magnetic field, the permanent magnet (usually made of lodestone) contains particles which are already arranged in a manner that produces a magnetic field.
Why does magnet attract?
The magnet induces magnetism in the iron - small magnetic regions in the iron become aligned, due to the magnetic field.
What is the Function of the rotor in an alternator?
This part forms the field circuit. It is a rotating part with a magnetic field that induces current into the stator
What is the function of the rotor of an alternator?
This part forms the field circuit. It is a rotating part with a magnetic field that induces current into the stator
What is the function of a rotor alternator?
This part forms the field circuit. It is a rotating part with a magnetic field that induces current into the stator
What is the function of a rotor in an alternator?
This part forms the field circuit. It is a rotating part with a magnetic field that induces current into the stator
Primary voltage is 5V and secondary is 30V the primary magnetic field is 15N what would the secondary magnetic field be?
This is a trick question. A transformer transforms voltage and currents. The magnetic field strength of 15 Newtons (a measurement of force, or power) is not changed - in other words what you put into a transformer (in terms of power) you get out the other side (minus losses). so 15N in, 15N out. You can also think of it this way: voltage is applied to the primary side, which induces a magnetic field. This magnetic field induces a voltage in the secondary side. So the magnetic field produced in the primary side is the same magnetic field that produces the secondary voltage. Thus the answer is in the question - the magnetic field is 15N (there's only one).
How Do's power transformer from one side to other of a transformer?
A transformer has two coils wound on an iron core which is there to support a magnetic field. A alternating voltage applied to one coil, called the primary, induces a magnetic field in the core. That field induces a back-emf in the primary coil, and also it induces an emf in the other coil, called the secondary. If a load current is taken from the secondary the current causes a reduction in the magnetic field, which is compensated by more current flowing in the primary. That is how power is transferred.
