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30 Cards in this Set

  • Front
  • Back
Ac frequency for most aircraft is
400 hz or 400 cycles per secound
what is a sine wave
a sine wave is a wave prouduced by a rotary generator one cycle begins at zero and ends at 360.
phase
when a sine wave crosses the zero line at the same time, the voltage and current are said to be in phase , in other words both voltage and current follow the identical sine wave.
phase angle
when certain circuit components cause a phase shift between the voltage and current, the amount of shift is referd to as the phase angle or the angle whose cosine is the powerfactor.
alternating current
ac current is current flow which continually changes its value and periodically reverses direction
direct current
dc electricity is nonvarying
in nature, the amplitude of volatage and current remain stedy.
apparent power
when both current and voltage are given in effective values the product of those effective values is called aparent power
true power
true power is the actual ac power in current when phase is taken into acount
ExIxpowerfactor= true power
resistive circuits
circuits containg componets such as lightbulbs,heaters,and compostion restistors are considerd to be resistive circuits
inductance
is a measure of the amount of magnetic flux produced for a given electric current.
inductance reactacne
inductave reactince is the oppostion to the flow of alternating current cause by a generation of back voltage
transformer
a transformer allows the values of ac voltage and current to be changed through the use of mutual inductance.
capacitors
a capacitor sometimes called a condensor is a device that stores electrical energy in the electrostaic fields that exist between two conductors that are seperated by an insulator or dielectric.
farads and columbs
a capacitors ability to store an electrical charge is mesured in farads. one farad is the capacity required to hold one coloumb of electricity under a force of 1 volt
switches
off is down on is up
Ac frequency for most aircraft is
400 hz or 400 cycles per secound
what is a sine wave
a sine wave is a wave prouduced by a rotary generator one cycle begins at zero and ends at 360.
phase
when a sine wave crosses the zero line at the same time, the voltage and current are said to be in phase , in other words both voltage and current follow the identical sine wave.
phase angle
when certain circuit components cause a phase shift between the voltage and current, the amount of shift is referd to as the phase angle or the angle whose cosine is the powerfactor.
alternating current
ac current is current flow which continually changes its value and periodically reverses direction
direct current
dc electricity is nonvarying
in nature, the amplitude of volatage and current remain stedy.
apparent power
when both current and voltage are given in effective values the product of those effective values is called aparent power
true power
true power is the actual ac power in current when phase is taken into acount
ExIxpowerfactor= true power
resistive circuits
circuits containg componets such as lightbulbs,heaters,and compostion restistors are considerd to be resistive circuits
inductance
is a measure of the amount of magnetic flux produced for a given electric current.
inductance reactacne
inductave reactince is the oppostion to the flow of alternating current cause by a generation of back voltage
transformer
a transformer allows the values of ac voltage and current to be changed through the use of mutual inductance.
capacitors
a capacitor sometimes called a condensor is a device that stores electrical energy in the electrostaic fields that exist between two conductors that are seperated by an insulator or dielectric.
farads and columbs
a capacitors ability to store an electrical charge is mesured in farads. one farad is the capacity required to hold one coloumb of electricity under a force of 1 volt
switches
off is down on is up