What are the 4 most important factors in an electric circuit?

The four most important factors in an electric circuit are voltage, current, resistance, and power. Voltage is the electrical potential difference that drives current through the circuit. Current is the flow of electric charge, while resistance opposes this flow and is determined by the materials and components in the circuit. Power, which is the rate at which energy is consumed or produced, depends on both voltage and current as described by the equation ( P = VI ).