Mind Map Gallery Magnetism and Types of Magnets Mind Map

Magnetism and Types of Magnets Mind Map

A magnetism mind map is an outline of various types of magnets and the magnetic forces they create. It provides a visual representation of the different magnetic properties, such as polarity, attraction, repulsion, and field orientation. The map typically includes diagrams detailing how two magnets interact when brought together and how their fields interact. It can also provide information on the strengths and weaknesses of each type of magnet. As per the mind map, magnetism can be divided into two major categories: natural magnets and artificial magnets. Natural magnets occur in nature, such as lodestones; meanwhile, artificial magnets are typically created by human beings through a process called magnetization. Examples of artificial magnets include electromagnets, permanent magnets, and temporary magnets. Additionally, the strength of a magnet can be categorized as either low or high, depending on the power it holds over other objects. EdrawMind is the best mind-mapping tool for creating similar mind maps.

Edited at 2022-12-11 18:46:15

Bhargaw Singh markam

Magnetism and Types of Magnets Mind Map

Bhargaw Singh markam

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Outline

MAGNETISM

general

They remain parallel to one another

They are separate and individual forces, since one line will never cross another;

they actually repel one another.

attraction of unlike poles and repel unlike polse

There is no known insulator for magnetic flux, or lines of force

Thus it is possible to shield items such as instruments from the effects of the flux by surrounding them with a material that offers an easier path for the lines of force.

The magnetic fields of the two magnets do not combine, but are rearranged into a distorted flux pattern.The magnetic fields of the two magnets do not combine, but are rearranged into a distorted flux pattern.

concentrated flux

called the north and south poles of the magnet

saturated.

When a magnetizing force is applied to a piece of magnetic material, a point is reached where no more lines of force can be induced or introduced.

nonmagnetic,

diamagnetic since they are repelled by both poles of a magnet.

These molecular magnets each possess a magnetic field, but in an unmagnetized state, the molecules are arranged at random throughout the iron bar

avoid applying direct heat, or hammering or dropping it

Heating or sudden shock will cause misalignment of the molecules, causing the strength of a magnet to decrease

keeper bars"

When a magnet is to be stored

s the property of an object to attract certain metallic substances.

ferrous materials;

composed of iron or iron alloys such as soft iron, steel, and alnico.

soft iron and other ferrous metals

a high permeability=1

The permeability scale is based on a perfect vacuum with a rating of one(1)

Air and other nonmagnetic materials are so close to this that they are also considered to have a rating of one.

nonferrous

nickel, cobalt, and gadolinium

which are magnetic to a limited degree.

with a permeability > 1, such as nickel and cobalt, are called paramagnetic.

Reluctance,

opposition to the lines of force through a material, can be compared to the resistance of an electrical circuit

. The reluctance of soft iron, for instance, is much lower than that of air.

Magnato motive force

The magnetomotive force, causing lines of force in the magnetic circuit, can be compared to the electromotive force or electrical pressure of an electrical circuit.

Subtopic

measured in gilberts,(F)

a magnetomotive force of one gilbert will cause one maxwell

the intensity of the lines of force, or flux, is the Greek letter (phi)

an area of one square centimeter produces a field intensity of one gauss.

the unit of field intensity is the gauss

An individual line of force, called a maxwell,

MAGNETIC PROPERTIES AND THE HYSTERESIS LOOP

there is a direct relationship between the intensity of the magnetizing force and the amount of magnetism developed in a material

amount of flux (flux density)

there is a direct relationship between the intensity of the magnetizing force and the amount of magnetism developed in a material a

Subtopic

hysteresis loop

as the magnetizing force is increased, the flux density (magnetic field) increases

magnetically saturated

increases in magnetizing force produces very little increase in magnetic flux

material's lingering flux (retentivity)

magnetizing force is reduce to zero some magnetic flux remains in the material

coercivity.

Application of a reversed magnetizing force removes the flux than remained in the magnetizing material

The coercive force is the magnetizing force in the opposite direction that needs to be applied to remove the retained flux.

EDDY CURRENTS

When the magnetic field in a conductor is changed, eddy currents develop.

The faster the rate of change in the conductor magnetic field, the greater the eddy currents

tend to generate heat and reduce the efficiency of devices

induce their own magnetic fields

prevention

permeable lamination

TYPES OF MAGNETS(natural or artificial.)

aiartificial

permanent magnets

retain their magnetism long after the magnetizing force has been removed

made of special alloys

common magnet materials

(very best) Aluminum-Nickel- Cobalt (Alnicos

alloy of iron, aluminum, nickel and cobalt,

Strontium-Iron (Ferrites, also known as Ceramics)

Neodymium-IronBoron (Neo magnets)

Samarium-Cobalt.

excellent magnetic qualities

Remalloy™

Permendur™

temporary magnets

type

soft iron

Magnets made of soft iron are very easily magnetized but quickly lose most of their magnetism when the external magnetizing force is removed.

residual magnetism,

The small amount of magnetism remaining,

great importance in such electrical applications as

generator operation.

quickly lose most of their magnetism

when the external magnetizing force is removed.

natural

no practical use

magnet

type of magnet

Horseshoe magnets

consists of two bars connected by a third bar, or yoke

long bar curved into a horseshoe shape

made in many different shapes

balls, cylinders, or disks.

One special type of magnet is the ring magnet, or Gramme ring