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### 30 Cards in this Set

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 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