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Electrical Devices (Capacitor (Capacitance is defined to be the amount of…

- - - - C
    - - Farad
    - - Electric Field
        
        Area that surrounds the electric charge or charges system where the increasing and decreasing of electric force exists.
      - Line of Electric Force
        
        A line of electric force is known as line or curve that pointed out from positive charge (+) to negative charge (-) in a magnetic field.
      - Electric Flux
        
        Known as amount of electric force line pointed out from positive charge (+) to negative charge (-) in a magnetic field. Flux symbol is Ψ(phi).
      - Electric Flux Density
        
        Electric flux density is a measurement of electric flux that pass through a unit of plates area with a coincide angle͕ that is an area of 1 m²
    - - -Capacitance between two plates proportional to the surface area
        -Capacitance between two plates inversely proportional to the thickness of dielectric
        -Increasing the dielectric constant of the material between the plates
    - - In initial state, a capacitor is uncharged (Vc = 0V). When a capacitor start charged, maximum current will be flowing (i = Imax). The current would be decreased by exponent, while voltage will be rising by exponent also. This state will continue until full state (steady) achieved. In this full state, current had decreased to zero value, while voltage increased until maximum value. The capacitor is said in fully charge.
    - - the capacitor giving up the stored charge in it. Hence the capacitor current exponentially reaches to zero from its initial value and the capacitor voltage reaches exponentially to zero from its initial value during discharging.
  - - - Ct=C1//(C2+C3)
  - - - Polarized
        
        -Mica
        -Ceramic
        -Film
        -Air Gap
        -Paper
      - Unpolarised
        
        -Aluminium
        -Tantalum
    - - Trimmer
- - - - L
    - - Henry
    - - production process electric form magnet
      - When a conductor is moved across a magnetic field so as to cut through the lines of force (or flux, an electromotive force (e.m.f) is produced in the conductor. If the conductor forms part of a closed circuit then the e.m.f produced causes an electric current to flow round the circuit. Hence an e.m.f is induced in the conductor as a result of its movement across the magnetic field͘.This effect is known as electromagnetic induction
    - - -An induced e.m.f is setup whenever the magnetic field linking that circuit changes
        -The magnitude of the induced e.m.f in any circuit is proportional to the rate of change of the magnetic flux linking the circuit.
    - - Inductance is the name given to the property of a circuit whereby there is an e.m.f induced into the circuit by change of flux linkages produced by a current change. When the e.m.f is induced in the same circuit as that in which the current is changing, the property is called self-inductance, L.
    - - -The number of turns of wire (N) more turns the higher the inductance
        -The cross-sectional area of the coil of wire (A) the greater the cross-sectional area the higher the inductance
        -The presence of magnetic core - when the coil is wound on an iron core, the same current sets up a more concentrated magnetic field and the inductance is increased
        -The way turns are arranged ʹ a short tick coil of wire has a higher inductance than
        the along thin one.
    - - When switch in a postion͘, inductor connected to DC supply. The current had not achieved maximum value immediately. The current are going to reach maximum value in a period of time that certain caused by production e.m.f induced by inductor which always against the supply voltage. In other words, the current of the circuit is rise delayed.
    - - When switch is being transformed to position b inductor circuit had shortcircuit (no supply voltage). The current is not decrease continue to zero but take a time that certain from maximum value until zero value. Refer to figure 6 which is shown the exponential graph changing of current in inductor circuit.
  - - - Lt=L1+ [(L2 x L3)//(L2+L3)]
  - - - -Air Core
        -Iron Core
        -Ferrite Core
    - - Core Loss