According to Ohm's law, what is the relationship between voltage, current, and resistance?

Ohm's law states that the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit is directly proportional. This relationship is expressed with the formula V = IR. In this equation, voltage is equal to the product of current and resistance.

This means that if the resistance is kept constant, any increase in current will lead to a proportional increase in voltage. Similarly, if the current decreases while the resistance remains unchanged, the voltage will correspondingly decrease. The simplicity of this linear relationship is fundamental to understanding how electrical circuits operate.

The other options do not accurately represent Ohm's law. V = I/R suggests a relationship that is not linear with respect to resistance, while V = R/I implies that resistance changes with varying voltage and current, which is incorrect. Lastly, V = I + R misrepresents the relationship entirely by suggesting that voltage is simply the sum of current and resistance, which does not align with the linear nature established by Ohm's law. Thus, the correct expression, V = IR, not only reflects the fundamental principle of electrical circuitry but also aids in calculations involving electric components.