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Questions and Answers
Which statement accurately describes direct current (DC)?
Which statement accurately describes direct current (DC)?
- The flow of charge is produced by an alternating voltage source.
- The flow of charge is used primarily for low-power applications.
- The flow of charge alternates its direction.
- The flow of charge moves in a single direction. (correct)
What is the characteristic of an alternating current (AC) waveform?
What is the characteristic of an alternating current (AC) waveform?
- The voltage alternates between positive and negative values. (correct)
- The voltage is always negative.
- The voltage is always positive.
- The voltage remains constant over time.
What is the primary reason for using AC current in commercial circuits?
What is the primary reason for using AC current in commercial circuits?
- AC current is more suitable for low-power applications.
- AC current is easier to generate and transmit over long distances. (correct)
- AC current is more efficient for short-distance transmission.
- AC current is safer than DC current.
What is the standard voltage and frequency of commercial AC circuits in North America?
What is the standard voltage and frequency of commercial AC circuits in North America?
What is the unit of power used to measure the rate at which energy is used or moves?
What is the unit of power used to measure the rate at which energy is used or moves?
What is the rate at which electrical energy is converted into another form called?
What is the rate at which electrical energy is converted into another form called?
Which formula represents the relationship between power, current, and voltage?
Which formula represents the relationship between power, current, and voltage?
What is the unit of electric power?
What is the unit of electric power?
How many joules are equivalent to 1 kilowatt-hour?
How many joules are equivalent to 1 kilowatt-hour?
If a device has a power rating of 500 Watts and operates for 3 hours, how many kilowatt-hours of energy does it consume?
If a device has a power rating of 500 Watts and operates for 3 hours, how many kilowatt-hours of energy does it consume?
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