alleryStart learning →Alternating current is best described as which of these?
ACharge flow in only one direction
BCharge flow that reverses direction
CCharge flow that is always constant
DCharge flow with no net movement
Answer & Solution
Correct answer: B. Charge flow that reverses direction
1. A time-varying voltage source drives charge first one way and then the other.
2. Alternating current is the flow of electric charge that periodically reverses direction.
3. Commercial and residential mains supplies are the everyday example.
4. Flow in only one direction is direct current, which is the steady state of a constant-voltage circuit.
_Source: OpenStax College Physics (CC BY 4.0), Ch 20 "Electric Current, Resistance, and Ohm's Law", section 20.5 Alternating Current versus Direct Current_
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