Build the Flow of Electricity

The Concept: Ohm's Law

Ohm's Law is the fundamental principle of DC circuits. It describes the relationship between three key quantities:
Voltage (V): The electrical "pressure" from the battery that pushes charges.
Current (I): The rate of flow of electric charge (the electrons).
Resistance (R): How much a component opposes the flow of current.

The law is beautifully simple: $V = I \times R$. This means the current flowing through a circuit is directly proportional to the voltage and inversely proportional to the resistance.

How to Use the Lab

• Adjust the Voltage slider to change the battery's power.
• Change the Resistor and Light Bulb sliders to alter their resistance values.
• Watch the blue particles (electrons) speed up or slow down based on the total current.
• Observe how the light bulb's brightness changes.
• The "Live Circuit Data" panel shows the calculated values based on Ohm's Law ($I = V / R$).