👉 Resistance math involves calculating the opposition to current flow in electrical circuits, typically measured in ohms (Ω). It's based on Ohm's Law, which states that the voltage across a conductor is directly proportional to the current flowing through it, provided the temperature and other physical conditions remain constant. The resistance \( R \) of a material is defined as the ratio of voltage \( V \) to current \( I \), expressed as \( R = \frac{V}{I} \). This relationship allows you to determine how much a material resists electrical flow, or equivalently, how much voltage is needed to produce a given current in a circuit. For example, if you know the resistance of a wire and the current it carries, you can calculate the voltage drop across it using \( V = I \times R \).
