ECEN 340 - T/F Questions with 100% correct answers

ECEN 340 - T/F Questions with 100%
correct answers

The fundamental principle in analyzing DC-DC converters is the average voltage across an
inductor over a cycle is zero. (T/F) - correct answer ✔✔ True



Pulse Width Modulation used for inverters can control both the frequency and the magnitude
of the output voltage. (T/F) - correct answer ✔✔ True



A well-designed, balanced three-phase power system can transmit three times the power of an
equivalent single-phase system for the same amount of wire. (T/F) - correct answer ✔✔ False



For a purely capacitive circuit, the voltage and current phasors are: - correct answer ✔✔
Perpendicular to each other with the current leading the voltage.



With the passive sign convention, an inductive load consumes reactive power making its power
factor leading. (T/F) - correct answer ✔✔ False



Reactive power consumption is generally done locally at the load side. (T/F) - correct answer
✔✔ True



In a balanced three-phase power system, the neutral current is always equal to zero. (T/F) -
correct answer ✔✔ True



Transformers transfer electrical energy from one side to the other through the changing electric
field that links both sides. (T/F) - correct answer ✔✔ False