In a direct current (DC) circuit, electrical current periodically reverses its direction o… — Armed Services Vocational Aptitude Battery (ASVAB)

In a direct current (DC) circuit, electrical current periodically reverses its direction of flow at a fixed frequency measured in hertz ( $\text{Hz}$ ).

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Answer

False. Direct current (DC) flows in a single constant direction, while alternating current (AC) periodically reverses its direction of flow.

The statement is false because direct current (DC) flows in one fixed direction without reversing. The periodic reversal of direction and polarity over time at a frequency measured in hertz (

\text{Hz}

) is the defining attribute of alternating current (AC).

Step-by-Step Solution

Define the fundamental behavior of direct current (DC).

Direct current is characterized by the unidirectional flow of electric charge, maintaining a constant polarity with a frequency of

0\text{ Hz}

Establishing the baseline definition of DC.

Analyze the characteristic described in the statement.

Periodic reversal of current flow at a measurable frequency in hertz (

\text{Hz}

) defines alternating current (AC).

Distinguishing between AC and DC waveform characteristics.

Evaluate the accuracy of the statement.

The statement incorrectly assigns the periodic reversal and frequency properties of AC to DC, making the statement false.

Determining the correct truth value.

Key Concept

Direct Current (DC) flows continuously in one direction with zero frequency, whereas Alternating Current (AC) periodically reverses direction at a specified frequency.

Estimated Time:30s

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