identify the “false” statement: a) Power electronics converters in general draw as well as inject non-sinusoidal currents. b) The effective value of any periodic current is equal to the direct current which flowing through a resistance R delivers the same power to R as the periodic current does. c) The average value of the instantaneous power of a pure inductive or pure capacitive loads is zero. d) If both current and voltage waveforms are sinusoids in an electrical circuit, the power factor can be given by cos ω, where ω is the phase angle between the voltage and the current waveforms. e) The voltage between any two lines in a three phase AC circuit are called phase voltages
Question
identify the “false” statement: a) Power electronics converters in general draw as well as inject non-sinusoidal currents. b) The effective value of any periodic current is equal to the direct current which flowing through a resistance R delivers the same power to R as the periodic current does. c) The average value of the instantaneous power of a pure inductive or pure capacitive loads is zero. d) If both current and voltage waveforms are sinusoids in an electrical circuit, the power factor can be given by cos ω, where ω is the phase angle between the voltage and the current waveforms. e) The voltage between any two lines in a three phase AC circuit are called phase voltages
Solution
The false statement is: e) The voltage between any two lines in a three phase AC circuit are called phase voltages.
The correct statement should be: The voltage between any two lines in a three phase AC circuit are called line voltages. The voltage across each component in a three phase AC circuit is called a phase voltage.
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