...because it takes so many ideas before the one that works is found.....

In basic electricity using direct current, there exist a series and parallel circuit. A series ciruit has only one path for the electric charge to flow. The parallel circuit has two or more components connected across the same voltage source. Ohm’s Law gives us: V = I * R where V = voltage
The voltage, V, is the amount of energy or force of the electric charge. It is measured in volts. The resistance, R, is the amount of force resisting the movement of the electrical force. It is measured in ohms. It effects the electrical force proportionately, much like the coefficient of friction resist mechanical movement. Additionally, Power = V * I much like Power = velocity * force
So why does a series circuit result in a change in current and a steady voltage? And, Why does a parallel circuit result in a change in current and maintain a steady voltage? Both circuits are mathematically possible. But what experiment or formula explains how the electrical charge is flowing through the circuit?
Obviously the position of the components change how the electrical charge flows. But why is this true? If an experiment or theory explains it, it would better explain the relationship between voltage and current. References: including 1 and 2
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