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What is the center of an electromagnet called when it is surrounded by coils of wire?
Wiki User
∙ 12y ago
In a transformer it is known as the transformer core.
Wiki User
∙ 12y ago
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What effect does increasing the number of coils have on an electromagnet?
Adding more coils will make the magnetic field stronger. Magnetic field increases.
What is the function of restraining coils in differential relay?
Restraining coils are also called as bias coils. Due to the difference in the magnetizing currents of the upper and lower current transformers the current through the operating coil will not be zero even under normal loading conditions or external fault conditions. therefore to provide stability on external faults bias coils are provided. To obtain the required amount of biasing a suitable ratio of the biasing coils with restraining coils to be provided.
Why transformer is called static device?
A transformer has two coils wound over a core. Depending on use, the two coils are named primary and secondary coils. The primary and secondary coils are linked magnetically (not electrically except in case of auto transformers) called mutual coupling. When the primary coil is excited with alternating voltage(A.C), varying magnetic flux is produced which links with the secondary coil and thus a voltage is induced in the secondary coil. Since there is no rotating or moving part utilized for the above process hence transformer is called a static device. The word static used here should not be confused for static charges. It only signifies "not moving"
What is winding transformer?
A winding is the name given each of the coils wound around the transformer's core. A basic transformer has two windings, termed the primary winding (connected to the supply) and the secondary winding (connected to the load).
Why does shunt generators produce only DC signal or emf?
This is in the wiring, the armature(s) field coils, etc, by the way if DC it would have permanent ( fixed) field magnets, not field coils. ac motors have Field coils, not to be confused with Field Amperage or Primary Coils- the latter being the (heart) of a transformer, consult Audels or similar technical shop manuals.
The strength of an electromagnet only depends on the current in the coils?
And the amount of coils.
What factors control the strength of an electromagnet?
The strength of an electromagnet is determined by the density of coils surrounding the magnet, and the rate of current passing through those coils.
The slower the coils of an electromagnet move stronger or weaker?
Weaker
What is the effect of increasing the number of coils of wire wrapped around the core of an electromagnet?
This causes the power of the electromagnet to be increased.
What is the A magnet that has coils of ccurrent-carrying wire around an iron core?
The current produces the magnetic field; such a magnet is called an electromagnet.
What happens to an electromagnet when electricity runs through it?
When an electric pulse runs through an electromagnet, the current travels in the electromagnets coils, causing a magnetic field to be developed inside and outside of the coils. The amount of coils, tightness of the coils, and the space between the coils are all very important factors in the production of said EM field.
How does a doorbell use an electromagnet?
The electromagnet is only part of the mechinism the whole item is called a solenoid which has a magnetized rod inside the electromagnet when 24 volts is applied the solenoid springs out of the coils of the electromagnet striking the bell. When released the rod returns by use of a spring and strikes another bell. Ding, Dong.
What was wrapped an iron bar to create the first electromagnet?
Coils of wire
What effect does decreasing the number of coils around the nail have on the strength of the electromagnet?
Decreasing the number of coils reduces the strength of the magnet.
Would spinning the loops on an electromagnet make it stronger?
Yes, if you increase the number of coils or loops in an electromagnet, it's power increases.
How do you make an electromagnet weak?
reducing the number of coils around the core or by reducing the current in an electromagnet, will cause the magnetic power to weaken.
What is a Bitter electromagnet?
A Bitter electromagnet is a strong electromagnet constructed from circular conducting metal plates and insulting spheres stacked in a helical configuration, rather than from coils of wire.
