Simplify the following text for a Grade 9 native English-speaking person.
Original: Current ( in amperes ) , in the same analogy , is a measure of the volume of water that flows past a given point , the rate of which is determined by the voltage , and the total output measured in watts .
Simplified: Current ( in amperes ) , in the same analogy , is a measure of the volume of water that flows past a given point per unit time ( volumetric flow rate ) .