Given the following voltage and current on the load, find the power factor, average power, reactive power, complex power, and apparent power. Also, find the equivalent impedance, equivalent resistance, and equivalent inductance of the load. Draw the phasors for P, Q, and S. The voltage and current are peak values.
v () t = 140cos ( 2 ? 60 t + 30 o ) V , i () t = 12cos ( 2 ? 60 t + 55 o ) A
The difference in phase angle is
? = ?v - ?i = 30o
- 55o
= -25o
The power factor is given by
pf = cos(?) = cos(-25o
) = 0.906308
The average power is
Z = V/I = 10.5736 - j4.93055 ?
R = 10.5736 ?
X = -4.93055 ?
C = -1/(?X) = 537.98954 ?F
You might also like to view...
Answer the following statements true (T) or false (F)
Fields can be updated each time a file is opened.
The top piston ring is positioned as high as possible on the piston to increase piston slap, help ring durability, and lower emissions.
Answer the following statement true (T) or false (F)
Technician A says that brake drums on the same axle should be close to the same inside diameter for best brake balance. Technician B says that a brake drum may be cracked if it rings like a bell when tapped with a light steel hammer. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
To operate as a voltage regulator, a zener diode requires a:
A) series resistor. B) transformer. C) series capacitor. D) silicon diode.