What is Ohm's Law?

Ohm's Law is fundamentally expressed with the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. The correct formula, V = I × R, indicates that the voltage across a conductor is directly proportional to the current flowing through it and the resistance of that conductor.

When analyzing a circuit, this law allows you to determine how much voltage is needed to push a certain amount of current through a resistor of a known value. For instance, if you know the current flowing and the resistance of the circuit, you can easily calculate the voltage. This makes understanding and applying Ohm's Law essential for electrical engineering, as it helps in designing and troubleshooting circuits by providing a clear relationship between these critical electrical parameters.

The other options provided are variations that do not reflect the correct relationship dictated by Ohm's Law. Hence, understanding the correct formula is crucial for anyone working in the field of electrical and instrumentation.