EEE 360; Exam 1 REVIEW
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ [LATEST] 100%
GUARANTEED PASS
Complex Power (VA) - CORRECT ANSWER-S = V_rms x I*_rms;
S = P + jQ
the rating of power equipment is described by the apparent power, S, also measured in volt-
amperes
P = real power
Q = reactive power
In this circuit, the current lags the applied voltage - CORRECT ANSWER-inductive
In this circuit, the current leads the applied voltage - CORRECT ANSWER-capacitive
Resistor real power equation - CORRECT ANSWER-S_R = V_R x I*
, Capacitive reactive power [negative] equation - CORRECT ANSWER-S_C = V_C x I*
Voltage source complex power equation - CORRECT ANSWER-S_S = V_S x I*
Voltage regulation - CORRECT ANSWER-The difference between the magnitudes of the voltage
at the load terminals for the no-load (V_no-load) and (full) load conditions divided by the load
voltage (V_load) magnitude
Voltage regulation generalizations - CORRECT ANSWER-Typically, the voltage regulation should
be less than 10%.
Overvoltage in no-load condition must be less than 5%.
The voltage drop in full load condition should not be more than -5%.
Loads - CORRECT ANSWER-Are represented by an impedance
Z = V_load / I_load = R + jX
Lagging - CORRECT ANSWER-The phase angle is positive if the load power factor is?
Leading - CORRECT ANSWER-The phase angle is negative is the load power factor is?
Low power factor - CORRECT ANSWER-This requires more rms current for the same load power
which results in greater utility transmission losses in the power lines.
S_load = V_load x I*_load = V_load x I_load x e^(+-jtheta_load) : (+) sign is used if the pf is? -
CORRECT ANSWER-Lagging
S_load = V_load x I*_load = V_load x I_load x e^(+-jtheta_load) : (-) sign is used if the pf is? -
CORRECT ANSWER-Leading
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ [LATEST] 100%
GUARANTEED PASS
Complex Power (VA) - CORRECT ANSWER-S = V_rms x I*_rms;
S = P + jQ
the rating of power equipment is described by the apparent power, S, also measured in volt-
amperes
P = real power
Q = reactive power
In this circuit, the current lags the applied voltage - CORRECT ANSWER-inductive
In this circuit, the current leads the applied voltage - CORRECT ANSWER-capacitive
Resistor real power equation - CORRECT ANSWER-S_R = V_R x I*
, Capacitive reactive power [negative] equation - CORRECT ANSWER-S_C = V_C x I*
Voltage source complex power equation - CORRECT ANSWER-S_S = V_S x I*
Voltage regulation - CORRECT ANSWER-The difference between the magnitudes of the voltage
at the load terminals for the no-load (V_no-load) and (full) load conditions divided by the load
voltage (V_load) magnitude
Voltage regulation generalizations - CORRECT ANSWER-Typically, the voltage regulation should
be less than 10%.
Overvoltage in no-load condition must be less than 5%.
The voltage drop in full load condition should not be more than -5%.
Loads - CORRECT ANSWER-Are represented by an impedance
Z = V_load / I_load = R + jX
Lagging - CORRECT ANSWER-The phase angle is positive if the load power factor is?
Leading - CORRECT ANSWER-The phase angle is negative is the load power factor is?
Low power factor - CORRECT ANSWER-This requires more rms current for the same load power
which results in greater utility transmission losses in the power lines.
S_load = V_load x I*_load = V_load x I_load x e^(+-jtheta_load) : (+) sign is used if the pf is? -
CORRECT ANSWER-Lagging
S_load = V_load x I*_load = V_load x I_load x e^(+-jtheta_load) : (-) sign is used if the pf is? -
CORRECT ANSWER-Leading
