The flow rate of liquid expressed in ____ is analogous to the flow rate of electricity expressed in amperes.

The flow rate of liquid expressed in gallons per minute (GPM) is analogous to the flow rate of electricity expressed in amperes because both measurements represent a rate of flow. In the context of drinking water systems, gallons per minute reflects how quickly water is moving through a system, similar to how amperes measure the movement of electric charge per second in an electrical circuit. This direct comparison makes gallons per minute a practical and widely used unit in both hydraulic and electrical contexts.

Other choices, while they also represent flow rates, offer different time scales or volumes that may not directly correspond with the common use of amperes. For instance, gallons per day or megaliters per day is often more appropriate for long-term water consumption analysis, while liters per minute serves as a flow measurement but is less commonly utilized in some regions compared to gallons. Therefore, gallons per minute best aligns with the concept of instantaneous flow, paralleling how amperes signify the immediate flow of electric current.