Current that reverses direction?

Current that reverses direction?

• A. Direct Current (DC)
• B. Alternating Current (AC)
• C. Pulsed Current
• D. Biphasic Current

Answer: (B)

When a current reverses direction, it is alternating current. In AC, the flow of electrons oscillates back and forth, reversing direction in a regular pattern (often a sine wave) and changing polarity many times per second. This is different from direct current, which travels in one steady direction, like from a battery. Pulsed current is delivered in bursts with pauses in between, so its pattern is on-off rather than continuous reversal. Biphasic current does involve a reversal within a cycle, but the defining idea behind a current that keeps switching direction over time is captured by the term alternating current.

When a current reverses direction, it is alternating current. In AC, the flow of electrons oscillates back and forth, reversing direction in a regular pattern (often a sine wave) and changing polarity many times per second. This is different from direct current, which travels in one steady direction, like from a battery. Pulsed current is delivered in bursts with pauses in between, so its pattern is on-off rather than continuous reversal. Biphasic current does involve a reversal within a cycle, but the defining idea behind a current that keeps switching direction over time is captured by the term alternating current.