It is analogous to gallons of water per second flowing in a hose. Note that voltage and current are totally different concepts. If the nozzle is partially open, there is both flow and pressure. Just as flow of water through a hose causes pressure drop due to friction, current flow in a wire causes voltage drop. The third concept is that of power.
Power is simply voltage times current.
It is also the amount of energy that is delivered in a unit of time. This is its power source. The more power that can be delivered to the motor, the better the car will accelerate. The P-N Junction Photovoltaic panels convert sunlight into electricity. The Solar Sprint solar panels are composed of 6 silicon cells connected in series.