103G Flashcards
The amount of emf generated depends on three factors
Magnetic density flux
Conductor length
Rate of speed
1 positive alternation is
0-180°
1 negative alternation is
180-360°
One positive alternation and one negative alternation is called
One cycle
A generator that produces ac is known as
Alternator
If the alternator coil is spinning at 60 rotations per second it produces
60 cycles per second
The output frequency of an ac generator or alternator is determined by two factors
The number of poles
The revolutions per minute
Peak voltage is the
Maximum of the sign wave
If the supply voltage to a building is 120V then the effective or rms value is
120V
Three factor contribute to impedance in an ac circuit
Resistance, inductive reactance, and capacitive reactance
Inductance
Opposes any change of current in that circuit
Capacitance is the value of
Electrical energy between an area of negative electrical charge and an area of positive electrical charge
Circuit impedance is the combination of
Resistance
Inductive reactance
Capacitive reactance
What is a dielectric
A material that’s a poor conductor but can store an electrical charge
