Glossary for Electromagnetism


Add at least two words to the glossary that you have learned in Electromagnetism. It doesn't matter if yours is another definition of a word that is already in the glossary.

Browse the glossary using this index

Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL

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A

Alnico

Aluminium, nickel and cobalt alloy  


B

Bonded magnet

Like a fridge magnet, scattered magnetic particals, weak magnet, will not work with other magnets.

Brass

Is not a magnetic material, like air.

C

Cumulative compounded

Cumulative Compounded machines have the series field and the shunt field assisting each other.


D

Diamagnetic

A material that is repelled by magnetism. This is due to it having a weak opposing polarity


E

eddy

circular motion of current


Electro magnet

Electro technology first word magnetism first word


F

Ferrimagnetic

Materials (eg iron) that are strongly attracted to both poles of a magnet.


Ferromagnetic

Ferromagnetic materials are strongly attracted to both poles of a magnet.


Flux Density

The flux per unit of an electric, luminous or magnetic field. 

Symbol   B

Unit        Tesla


H

Henry

The unit of Inductance


Hysteresis

The delay between the change to a system and the resulting output.


I

Inductance

The effect that inductors have to changing current.


Inductor

An inductor is a coil of wire. 


IR drop

Voltage drop due to current and resistance.


M

Magnetic Reluctance

A materials opposition to being magnetised.


Motor Action

Mechanical force is exerted. on a current-carrying conductor in a magnetic field


Mutual Inductance

Mutual Inductance is the interaction of one coils magnetic field on another coil as it induces a voltage in the adjacent coil.


N

Neodymium

A permanent magnet made from an alloy of neodymium , iron and boron.


P

Paramagnetic

An object which is slightly attracted by a magnetic field


Paramagnetic Materials

Paramagnetic materials are weakly attracted to both poles of a magnet.


Permeability

The ease with which a magnetic material can be magnetised.


Perpendicular

At 90 degrees


Polarity

The direction of a magnetic or electric field.


Primary

The first coil in a transformer. In other words the one connected to the power sauce.
(do you like what I did there. I made a funny joke about sauce when it should have been source. I'm bloody hilarious aren't I.)

Prime Mover

The thing that spins the generator. I could be wind. 


R

Regulation

The measure of how well a power generator maintains constant voltage over a range of load currents is called voltage regulation. It can be calculated from the following formula:

R e g percent sign equals 100 asterisk times fraction numerator V subscript n o space l o a d end subscript space minus space V subscript f u l l space l o a d end subscript over denominator V subscript f u l l space l o a d end subscript end fraction


Reluctance

Reluctance is the magnetic equivalent to resistance.


Residual

left over


Retentivity

This is the ability of a ferromagnetic materiap to retain magnetic flux


S

Saturation

Has just about as mach as it can easily take. Applying more force will result in minimal additional field.


T

Tesla

The unit of Flux Density

The Symbol is B


V

Voltage Regulation

Measure of change in voltage magnitude between sending and recieiving end.
e.g. full-load and no-load.


Voltage Regulation

Voltage Regulation is the difference between the no load voltage and the full load voltage expressed as a percentage of the full load voltage.



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