Which current regularly reverses its direction?

Which current regularly reverses its direction?

• A. Direct current
• B. Alternating current
• C. Galvanic current
• D. High Frequency

Answer: (B)

Alternating current is the type of electrical current that regularly reverses its direction. In AC, the flow of electrons changes back and forth in a repeating pattern (typically a sine wave), so the direction switches many times per second. This contrasts with direct current, which moves in one constant direction. Galvanic current is a direct current used in some modalities, so it does not reverse direction. High frequency is a form of alternating current with rapid oscillations, but the essential idea described by the question is captured by alternating current, the current that reverses direction regularly.

Alternating current is the type of electrical current that regularly reverses its direction. In AC, the flow of electrons changes back and forth in a repeating pattern (typically a sine wave), so the direction switches many times per second. This contrasts with direct current, which moves in one constant direction. Galvanic current is a direct current used in some modalities, so it does not reverse direction. High frequency is a form of alternating current with rapid oscillations, but the essential idea described by the question is captured by alternating current, the current that reverses direction regularly.