Podcast
Questions and Answers
What type of current periodically reverses direction and changes its magnitude continuously with time?
What type of current periodically reverses direction and changes its magnitude continuously with time?
- Triangular current
- Direct current (DC)
- Square current
- Alternating current (AC) (correct)
What is the usual waveform of alternating current in most electric power circuits?
What is the usual waveform of alternating current in most electric power circuits?
- Sawtooth wave
- Square wave
- Sine wave (correct)
- Triangular wave
What is the number of cycles or periods per second known as in alternating current?
What is the number of cycles or periods per second known as in alternating current?
- Amplitude
- Frequency (correct)
- Wavelength
- Voltage
What is a single-phase power?
What is a single-phase power?
What are the components of AC power used for domestic and commercial applications?
What are the components of AC power used for domestic and commercial applications?
Which wire is typically present in a single-phase power circuit, along with the phase wire?
Which wire is typically present in a single-phase power circuit, along with the phase wire?
What is the advantage of a three-phase system compared to an equivalent single-phase system?
What is the advantage of a three-phase system compared to an equivalent single-phase system?
Why is electrical energy distributed as alternating current (AC)?
Why is electrical energy distributed as alternating current (AC)?
What is the formula to describe the power losses in the wire?
What is the formula to describe the power losses in the wire?
What are the advantages of three-phase motors and transformers compared to single-phase ones?
What are the advantages of three-phase motors and transformers compared to single-phase ones?
Why is the power delivered by a three-phase system relatively constant at all times?
Why is the power delivered by a three-phase system relatively constant at all times?
Why is AC voltage used for transmission of electrical energy?
Why is AC voltage used for transmission of electrical energy?
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