Who proved by an experiment that a precise relationship exists between current, voltage, and resistance?

The correct answer is George Simon Ohm. He is well-known for formulating Ohm's Law, which establishes a fundamental relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. Ohm conducted experiments in the 1820s that demonstrated how the current passing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor. This relationship is often expressed as the formula V = I × R.

Ohm's experiments provided empirical evidence to support this relationship, allowing it to be utilized in electrical engineering and various applications where circuit analysis is required. His work laid the foundation for much of modern electrical theory and practice, making it crucial for anyone studying electronics to understand these principles.

In contrast, other figures like Thomas Edison focused more on the practical applications of electricity and electrical devices without formalizing a mathematical relationship like Ohm did. Benjamin Franklin contributed significantly to the field of electricity through his experiments and inventions, but he did not define the relationship between current, voltage, and resistance as systematically as Ohm. Michael Faraday is renowned for his discoveries in electromagnetism and electrochemistry, but he did not establish the specific relationship of current,