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How is electric current defined in terms of charge and time?
AThe rate at which electric charge moves past a point
BThe total charge stored permanently inside a battery
CThe energy released when two charges collide head on
DThe distance a single free electron travels in a wire
Answer & Solution
Correct answer: A. The rate at which electric charge moves past a point
1. Electric current I is defined as the amount of charge that flows past a point divided by the time taken, I = deltaQ / deltat.
2. This definition describes a rate of flow of charge, not a stored amount or a distance.
3. Matching this to the options, the current is the rate at which charge moves past a point.
_Source: OpenStax Physics (CC BY 4.0), Ch 19 "Electrical Circuits", section 19.1 Ohm's law_
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