AC Power

Question 1

True Power

Answer 1

Real power referee to as watt full power

Value product of RMS current

Measured in watts or kilowatts (kW)

Question 2

Pure Capacitive in AC

Answer 2

Current and voltage out of phase at 90 degrees
No power absorbed

Power is required to overcome effect
Charge capacitor and then release

Question 3

Inductors in AC Circuit

Answer 3

Used for safety circuits
One side to earth one side

Power is required to overcome the out of phase angle

Question 4

Reactance

Answer 4

Effect of capacitive or inductive circuits - capacitors and inductors (coils)

Form of resistance in ohms

Back EMF
- Generator will become motor or motor will become a generator therefore reactance needed to keep balance

Resistance (R) + reactance (X)

Impedance = Square root of r2 + x2

Question 5

Apparent Power

Answer 5

Dissipated and absorbed and returned

Measured in unit of volt amps (VA_
AC generators rate in kVA

Question 6

AC Power Rating

Answer 6

Real Power (kW)
Reactive power (kVAR) - wasted
Real + Reactive (kVA)