Page |1
EEE 360; Exam 1 Questions and Correct
Answers/ Latest Update / Already Graded
If the power is positive, the element is absorbing or supplying power.
Ans: absorbing, like a load
If the power is negative, the element is absorbing or supplying power.
Ans: supplying, like a generator.
The RMS value of v(t) = Vmaxcos(wt + theta) is given by:
Ans: Vmax / 2^0.5
For balanced wye-delta loads, Z delta = ?
Ans: Z delta = 3Zy
For delta transformers, Vphase = ?
Ans: V line to line. There is no neutral
In wye circuits, Phase = ?
Ans: V line to neutral voltage
All rights reserved © 2025/ 2026 |
, Page |2
Step-down transformers
Ans: Wye-delta transformers are frequently used as this.
current magnitude
Ans: I_M = rad(2)I_rms
Complex Power (VA)
Ans: 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
Ans: inductive
In this circuit, the current leads the applied voltage
All rights reserved © 2025/ 2026 |
EEE 360; Exam 1 Questions and Correct
Answers/ Latest Update / Already Graded
If the power is positive, the element is absorbing or supplying power.
Ans: absorbing, like a load
If the power is negative, the element is absorbing or supplying power.
Ans: supplying, like a generator.
The RMS value of v(t) = Vmaxcos(wt + theta) is given by:
Ans: Vmax / 2^0.5
For balanced wye-delta loads, Z delta = ?
Ans: Z delta = 3Zy
For delta transformers, Vphase = ?
Ans: V line to line. There is no neutral
In wye circuits, Phase = ?
Ans: V line to neutral voltage
All rights reserved © 2025/ 2026 |
, Page |2
Step-down transformers
Ans: Wye-delta transformers are frequently used as this.
current magnitude
Ans: I_M = rad(2)I_rms
Complex Power (VA)
Ans: 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
Ans: inductive
In this circuit, the current leads the applied voltage
All rights reserved © 2025/ 2026 |