# data[].attributes.body
Part 1 : Basic Theory

Define :
1). Magnetomotive Force , mmf
-  Coils that generate magnetic field in magnetic core
- F = N (At)

2). Reluctance
-

3). Fluks

4). Field Intensity
- Formula : H = (F/l)

5). Flux Density
- Number of the magnetic lines of flux
- Formula : B =  f (fluks) / A (area)

6). Permeability
- Mengukur fluks magnet yang melalui sesuatu bahan (Wb/Am)

# data[].attributes.body
Before you do circuit analysis, lets recall this term:
Define:
1) Magnetomotif Force
2) Reluctance
3) Flux
4) Field Intensity
5) Flux Density
6) Permeability

# data[].attributes.body
Can you determine the magnetomotif force, flux, Rc, and Rg if the current is 2 Ampere, number of turn = 100, and the material has relative permeability of 5000 and cross section area 25 cm square. the area in air gap is the same with the material. the length of the material, lc is 40 cm and the length of air gap is 0.5 cm.

# data[].attributes.body
1. define

# data[].attributes.body
Let say the number of turn for the coil is 200 and the current supply is 1.5 A. R1 and R2 are given by 40 A-t/wb and 60 A-t/wb respectively, determine  Ф, Ф1 and Ф2

# data[].attributes.body
Hafizah bt Mat Yusof

2. calculate

# data[].attributes.body
Define:
1) Magnetomotif Force

the magnetomotive force (mmf) is a quantity appearing in the equation for the magnetic flux in a magnetic circuit, often called Ohm's law for magnetic circuits.It is the property of certain substances or phenomena that give rise to magnetic field

2) Reluctance

Magnetic reluctance, is a concept used in the analysis of magnetic circuits. It is defined as the ratio of magnetomotive force (mmf) to magnetic flux.

3) Flux

the quantity which passes through a surface or substance or measurement of the total magnetic field which passes through a given area.

4) Field Intensity

is a ratio of the MMF needed to create a certain Flux Density (B) within a particular material per unit length of that material.

5) Flux Density

The number of magnetic lines of flux that pass through a certain point on a surface

6) Permeability

Is a measure of the ease by which a magnetic flux can pass through a material

# data[].attributes.headline
Nurul Ain yaakop                      for the calculation

# data[].attributes.subject
Nurul Ain yaakop                      for the calculation

# data[].attributes.body
A14PP3098
Firstly i would like to upload my own diagram formula to fast remember. Refer figure below. To define the:
- Magnetomotif Force is like a power source where it induce by electromagnetic effect. It also known as mmf and the unit is At.
- Reluctance is such as flux resistance. It can be limit due to the value of permeability properties, area and length. The unit is At/Wb.
- Flux is a cumulative electromagnetic field that move in to circuit. it depends on permeability, number of turn, cross section area, current supply and length. the unit is Wb.
- Flux intensity is an ability due to material properties and flux density expending. It related to BH-Curve.The unit is At/m.
- Flux density is flux content due to that area only. it depend on the cross section area. if the cross section area small the flux way and carry less than big area. The unit is Tesla.
- Permeability is the material properties. it can be μo if air gap.

# data[].attributes.body
Nourul Nazrazan (A14PP3072

# data[].attributes.body
PART 1

1) MAGNETOMOTIF FORCE

Coil generates magnetic field in magnetic core. Driving force, F needed to overcome core reluctance, R. The MMF is generated by the coil. Strength related to number of turns and currents, measured in Ampere turns (At).

2) RELUCTANCE
Resistance” to flow of magnetic flux. Associated with “magnetic circuit” – flux equivalent to current.  Also to be defined the ratio of magnetomotive force (mmf) to magnetic flux.

3) FLUX
Flux is a measurement of the total magnetic field which passes through a given area. It is a useful tool for helping describe the effects of the magnetic force on something occupying a given area. The measurement of magnetic flux is tied to the particular area chosen.

4) FLUX INTENSITY
The longer the magnetic path the greater the MMF required to drive the flux. Magnetomotive force per unit length is known as the “magnetizing force” H or Magnetic field intensity.

5) FLUX DENSITY
Flux density (Magnetic flux density) is represent by symbol “B”. The flux density is the number of magnetic lines of flux that pass through a certain point on a surface. The SI unit is T (tesla), which is weber per square metre (Wb/m2) and the unit in the CGS system is G (gauss). 1 tesla is equivalent to 10,000 gauss.

6) PERMEABILITY
Permeability μ is a measure of the ease by which a magnetic flux can pass through a material (Wb/Am). Permeability of free space μo = 4π x 10-7 (Wb/Am)

# data[].attributes.headline
Nurul Ain Yaakop                     for the calculation part 2

# data[].attributes.subject
Nurul Ain Yaakop                     for the calculation part 2

# data[].attributes.body
PART 1: Basic Theory:

Before you do circuit analysis, lets recall this term:
Define:
1) Magnetomotif Force
2) Reluctance
3) Flux
4) Field Intensity
5) Flux Density
6) Permeability

1) Magnetomotif force (MMF/F)

- It is the external force required to set up the magnetic flux lines within the magnetic material.

- The magneto motive force F is equal to the product of the number of turns around the core and the  current through the turns of wire.

F = NI

2) Reluctance

- It is the property of a material which opposes the creation of magnetic flux in it

- It is analogous to resistance in an electrical circuit

3) Flux

- the action or process of flowing or flowing out.

4) Flux Intensity

= The magnetomotive force per unit length

H = NI/l At/m

5) Flux Density

= The number of magnetic lines of flux that pass through a certain point on a surface

- Β = φ/A Wb/m^2

6) Permeability

It is the degree of magnetization of a material to allow magnetic flux to pass through it.

It is analogous to conductivity in an electrical circuit

# data[].attributes.body
A14PP3125

PART 1

# data[].attributes.body
NITHIYAA PARAMANANTHA

# data[].attributes.body
Part 1 : Basic theory

# data[].attributes.body
PART 1

Define:

1) Magnetomotif Force

The magnetomotive force, mmf, is analogous to the electromotive force and may be considered the factor that sets up the flux, φ. The mmf is equivalent to a number of turns, N of wire carrying an electric current, I and has units of ampere-turns. If either the current through a coil (as in an electromagnet) or the number of turns of wire in the coil is increased, the mmf is greater; and if the rest of the magnetic circuit remains the same, the magnetic flux increases proportionally.

2) Reluctance

The reluctance of a magnetic circuit is analogous to the resistance of an electric circuit. Reluctance depends on the geometrical and material properties of the circuit that offer opposition to the presence of magnetic flux. Reluctance of a given part of a magnetic circuit is proportional to its length and inversely proportional to its cross-sectional area and a magnetic property of the given material called its permeability.

3) Flux

The magnetic flux in magnetic circuit is analogous to the electric current in electrical circuit. Just like current, flux has magnitude and direction. The direction of magnetic flux of normal permanent magnet is normally North to South direction. In electromagnetic reaction , the direction of flux can be defined using left hand rule.

4) Field Intensity

Magnetic field intensity, H is known as magnetomotive force per unit length. It is a measure of the magnetic flux strength on certain distance or length. Magnetic flux intensity diminishes with increasing distance from a straight current-carrying wire or a straight line connecting a pair of magnetic poles around which the magnetic field is stable.

5) Flux Density

Flux density (Magnetic flux density), B is the number of magnetic lines of flux that pass through a certain point on a surface of area. At a given location in the vicinity of a current-carrying wire, the magnetic flux density is directly proportional to the current, I in amperes, including the coil number of turns, N.

6) Permeability

Permeability μ is a measure of the ease by which a magnetic flux can pass through a material (Wb/Am). Permeability of free space μo = 4π x 10-7 (Wb/Am). Relative permeability μr varies depends on material used. The total permeability is calculated as μ = μr  x μo.

# data[].attributes.body
PART 1, PART2 & PART 3

# data[].attributes.body
A14PP3048

PART 1
(1) Magnetomotif Force, MMF
a quantity that representing the equation of magnetic flux in a magnetic circuit.

F = NI

while N = Number of turns and I = Current

(2) Reluctance, R
a quantity of resistance in a magnetic circuit

R = l/µA

(3) Flux, ɸ

total magnetic field which passes through a given area

ɸ = NI/R

(4) Field Intensity

flux intensity is the magnetic field of an electrically charged current

H = B/µ

(5) Flux Density
the amount of magnetic flux pass through the area or substances

Β =  ɸ /A

(6) Permeability
is a measure of the ease by which magnetif flux can pass through a material.

µr = µ/µ₀

while µ₀ = 4n x 10⁻⁷ (Wb/Am)

PART 2 - Simple Series Circuit

# data[].attributes.body
PART
MAGNETIC FORCE
F=NI
Force generate by the coils and depends on number of turns winding and the current in the circuit.
RELUCTANCE
Reluctance is like a flux resistance..Reluctance have a relationship with a lenghth, permeability properties and area..the unit of reluctance is At/Wb..reluctance also can describe as ratio of the magnetomotif force (mmf) to magnetic flux.
FLUX
Flux is like electric current flow in the current..direction flux for permanent magnet is show flux flowing from north pole to south pole. The direction of magnetic flux can be defined using Faraday and Lenz Law
FIELD INTENSITY
Magnetomotive force per unit lenght..Measure the strenghth of magnetic flux on certain length
FIELD DENSITY
The amount of magnetic flux pass a certain surface or area
PERMEABILITY
Meterial properties

# data[].attributes.body
Part 1

# data[].attributes.body
Before you do circuit analysis, lets recall this term:
Define:
1) Magnetomotif Force
Mmf is sum of magnetizing force along the circuit,
F = NI

2) Reluctance
Ratio of mmf to magnetic flux,
Reluctance = mmf/magnetic Reluctance

3) Flux
Number of electrical lines force ,
Flux = u.N.I.A / l

4) Field Intensity
Magnetic field intensity is a ratio of fmf needed to create a cartain flux density,
H = B / u

5) Flux Density
The amount of magnetic flux in an area taken perpendicular to magnetic flux direction.
B = flux / A

6)Permeability
Measure the ability of a material to support the formation of magnetic field within itself

# data[].attributes.body
Nithiyaa Paramananthan

# data[].attributes.body
Part 1

# data[].attributes.body
A14PP3065

1) Define

# data[].attributes.body
Part II PARALLEL CIRCUIT

# data[].attributes.body
A14PP3117

# data[].attributes.body
Part 1

# data[].attributes.body
Part 2 - 1- Simple Series Circuit

# data[].attributes.body
Part 1 : Basic theory

# data[].attributes.body
A14PP3048

PART 3 - Parallel Circuit

# data[].attributes.body
Part 2 : Simple series circuit

# data[].attributes.body
A14PP3125

PART 2 SIMPLE SERIES CIRCUIT

# data[].attributes.body
Part 2 : Parallel circuit

# data[].attributes.body
Part 1 & part 2

# data[].attributes.body
PART 1

# data[].attributes.body
Part 1

# data[].attributes.body
Part 2 : Series & Parallel

# data[].attributes.body
A14PP3125

PART 2 PARALLEL CIRCUIT

# data[].attributes.body
Part 2 - II - Parrallel Circuit

# data[].attributes.body
PART 1,2,3 BARU

# data[].attributes.body
Calculation

# data[].attributes.body
1.

# data[].attributes.body
PART 2 - 1(series circuit)

# data[].attributes.body
Formula

# data[].attributes.body
Part 2 - simple series circuit

# data[].attributes.body
SAMBUNGAN PART 1

# data[].attributes.body
Part 2 -II

# data[].attributes.body
Part 2 - parallel circuit

# data[].attributes.body
part 2-1

# data[].attributes.body
part2-2

# data[].attributes.body
1) Magnetomotif Force
MMF is required to drive the magnetic flux in the magnetic circuit. The magnetic pressure, which sets up the magnetic flux in a magnetic circuits called Magnetomotive Force. The SI unit of MMF is Ampere-turn (AT), and their CGS unit is G (gilbert).
2) Reluctance
Reluctance is analogous to resistance. As resistance opposes electric current in an electric circuit that same work a reluctance does in a magnetic circuit.
3)Flux
Flux means an imaginary lines through which a physical quantity can travel such as magnetic flux which  is  the number magnetic field lines passing through a closed surface.
4) Field intensity
Magnetic field intensity (H) know as magnetomotive force per unit length it use to measure the magnetic flux strengthen in certain length
5) Flux Density
The flux density is the number of magnetic lines of flux that pass through a certain point on a surface. The SI unit is T (tesla), which is weber per square metre (Wb/m²)
6)Permeability

Permeability is the ability to support formation of magnetic fields in a material

- The Permeability of Free Space( µ ₀ )

-The Relative Permeability

The relative permeability is the ratio of the permeability of a specific medium to the permeability of free space µ ₀

µ r = µ / µ ₀                                             (1)

where

µ r = the relative permeability

µ = permeability of the medium (H/m)

# data[].attributes.body
Part 2 series circuit

# data[].attributes.body
Part 2 - parallel circuit

# data[].attributes.body
Part 2(i)

# data[].attributes.body
Part 2(ii)

# data[].attributes.body
Part 2 - i (Simple Series circuit

# data[].attributes.body
Part 2 ii- Parallel circuit

# data[].attributes.body
A14PP3010

# data[].attributes.body
1) Magnetomotif Force is the coil generates magnetic field in magnetic core. Driving force, F needed to overcome core reluctance, R. The MMF is generated by the coil. Strength related to number of turns and currents, measured in Ampere turns (At).
F = NI

2) Reluctance, R
total resistance in a magnetic circuit
R = l/µA

3) Flux, ɸ

Flux is a measurement of the total magnetic field which passes through a given area. It is a useful tool for helping describe the effects of the magnetic force on something occupying a given area. The measurement of magnetic flux is tied to the particular area chosen.
ɸ = NI/R

(4) Field Intensity, H

is a ratio of the MMF needed to create a certain Flux Density (B) within a particular material per unit length of that material. H = B/µ

(5) Flux Density
The flux density is the number of magnetic lines of flux that pass through a certain point on a surface. The SI unit is T (tesla), which is weber per square metre (Wb/m2)
Β =  ɸ /A

(6) Permeability, µ
the total magnetif flux can pass through a material.
µ= µrµ₀

# data[].attributes.body
Chen Jin Xian
A14PP3009

# data[].attributes.body
Chen Jin xian
A14PP3009

# data[].attributes.body
2. Part 2

# data[].attributes.body
Part 2 (Simple Series Circuit and Parallel Circuit

# data[].attributes.body
A14PP3107 ( new)
Part 1: Basic Theory

Before you do circuit analysis, let’s recall this term:

Define:
1)  Magnetomotive Force, (F)

-    Magneto motive force is the ability creates a magnetic flux in magnetic circuit.

ℱ = ΦR / F = NI, (A-t) / ℱ = HL

2)   Reluctance, (R)

-    The resistance to magnetic flux offered by a magnetic circuit, determined by the permeability and arrangement of the material of the circuit.

Â = l/mrmoA, (A-t/Wb)

3)  Flux, (F)

-     Flux is the presence of a force field in a specified physical medium, or the flow of energy through a surface. In electronics, the term applies to any electrostatic field and any magnetic field. Flux is depicted as "lines" in a plane that contains or intersects electric charge poles or magnetic poles.

F = BA (A is cross-sectional area in square meters), F  (Webers, Wb)

4)   Field Intensity, (H)

-     The magnetic field intensity (H) is the magnetic field of an electrically charged current. The magnetic field intensity is operationally defined and measured by a long coil whose own field intensity exactly equalizes the field being measured.

H = NI/l (l = path length in meters), (A-t/meter)

5)   Flux Density, (B)

-    The flux density (B) is the number of magnetic lines of flux that pass through a certain point on a surface. The SI unit is T (tesla), which is Weber per square metre (Wb/m2)

B = mH, Wb/meter2

6)      Permeability, (μ)

-    Magnetic permeability (μ) is the ability of a magnetic material to support magnetic field development. In other words, magnetic permeability is the constant in the proportionality between magnetic induction and magnetic field intensity.
μ = μrμo  , Where μr is the relative permeability of the material and

μo = 4n x 10-7 H/m is the permeability of free space.

# data[].attributes.body
PART 1

Define:

1) Magnetomotif Force

The magnetomotive force, mmf, is analogous to the electromotive force and may be considered the factor that sets up the flux, φ. The mmf is equivalent to a number of turns, N of wire carrying an electric current, I and has units of ampere-turns. If either the current through a coil (as in an electromagnet) or the number of turns of wire in the coil is increased, the mmf is greater; and if the rest of the magnetic circuit remains the same, the magnetic flux increases proportionally.

2) Reluctance

The reluctance of a magnetic circuit is analogous to the resistance of an electric circuit. Reluctance depends on the geometrical and material properties of the circuit that offer opposition to the presence of magnetic flux. Reluctance of a given part of a magnetic circuit is proportional to its length and inversely proportional to its cross-sectional area and a magnetic property of the given material called its permeability.

3) Flux

The magnetic flux in magnetic circuit is analogous to the electric current in electrical circuit. Just like current, flux has magnitude and direction. The direction of magnetic flux of normal permanent magnet is normally North to South direction. In electromagnetic reaction , the direction of flux can be defined using left hand rule.

4) Field Intensity

Magnetic field intensity, H is known as magnetomotive force per unit length. It is a measure of the magnetic flux strength on certain distance or length. Magnetic flux intensity diminishes with increasing distance from a straight current-carrying wire or a straight line connecting a pair of magnetic poles around which the magnetic field is stable.

5) Flux Density

Flux density (Magnetic flux density), B is the number of magnetic lines of flux that pass through a certain point on a surface of area. At a given location in the vicinity of a current-carrying wire, the magnetic flux density is directly proportional to the current, I in amperes, including the coil number of turns, N.

6) Permeability

Permeability μ is a measure of the ease by which a magnetic flux can pass through a material (Wb/Am). Permeability of free space μo = 4π x 10-7 (Wb/Am). Relative permeability μr varies depends on material used. The total permeability is calculated as μ = μr  x μo.

PART 2

# data[].attributes.body
Define:
1) Magnetomotif Force

the magnetomotive force (mmf) is a quantity appearing in the equation for the magnetic flux in a magnetic circuit, often called Ohm's law for magnetic circuits.It is the property of certain substances or phenomena that give rise to magnetic field

2) Reluctance

Magnetic reluctance, is a concept used in the analysis of magnetic circuits. It is defined as the ratio of magnetomotive force (mmf) to magnetic flux.

3) Flux

the quantity which passes through a surface or substance or measurement of the total magnetic field which passes through a given area.

4) Field Intensity

is a ratio of the MMF needed to create a certain Flux Density (B) within a particular material per unit length of that material.

5) Flux Density

The number of magnetic lines of flux that pass through a certain point on a surface

6) Permeability

Is a measure of the ease by which a magnetic flux can pass through a material