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Difficulty: EasyDirect Current (DC) vs. Alternating Current (AC)

Match each electrical component or power source to its corresponding operational characteristic regarding alternating current (AC) and direct current (DC).

  • Automotive batteryProvides steady direct current (DC) flowing in one constant direction
  • Residential wall outletSupplies alternating current (AC) that periodically reverses direction
  • RectifierConverts alternating current (AC) into direct current (DC)
  • InverterConverts direct current (DC) into alternating current (AC)

Answer

Automotive battery pairs with steady direct current flowing in one constant direction; Residential wall outlet pairs with supplying alternating current that periodically reverses direction; Rectifier pairs with converting AC into DC; Inverter pairs with converting DC into AC.
An automotive battery supplies direct current (DC) flowing in a single fixed direction, while a residential wall outlet provides alternating current (AC) that constantly reverses direction. For power conversion, a rectifier changes AC into DC, and an inverter changes DC into AC.

Step-by-Step Solution

1
Classify the output type of the power sources.
An automotive battery produces a constant direct current (DC) flowing continuously from negative to positive terminals. A residential wall outlet delivers power that oscillates in polarity and reverses direction, which is alternating current (AC).
Electrochemical cells maintain constant terminal polarity, whereas utility power grids distribute AC power generated by rotating alternators.
2
Differentiate between the two electrical conversion devices.
A rectifier changes alternating current (AC) into direct current (DC), while an inverter changes direct current (DC) into alternating current (AC).
Rectifiers are used to power DC electronics from AC grid mains, whereas inverters allow standard AC appliances to operate from DC battery banks.

Key Concept

Distinction between AC and DC sources and the functional roles of rectifiers and inverters
Estimated Time:45s
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Topics

Direct Current (DC) vs. Alternating Current (AC)

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