Ohm’s law can also be taken as a statement for

Ohm’s law, expressed as V = IR, describes the relationship between potential difference, current, and resistance. In an electrical circuit, the voltage source provides energy to the charges, creating an electric field that drives current. According to the principle of conservation of energy, the electrical energy supplied by the source must be accounted for within the circuit. In a resistor, this electrical energy is dissipated or converted into other forms, such as thermal energy (heat) [1]. Thus, Ohm’s law serves as a specific statement of the conservation of energy for resistive elements, where the work done per unit charge (voltage) by the electric field is balanced by the energy dissipated as the charges move through the conductor's resistance. While Kirchhoff's laws also explicitly state conservation principles, Ohm's law provides the energy-dissipation relationship necessary to satisfy energy balance in resistive circuits.

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 11: Electricity > What you have learnt > p. 192