When measuring electrical resistance, which unit is predominantly used?

The predominant unit used for measuring electrical resistance is the Ohm. This unit is critical in understanding how materials conduct electricity and is defined in the International System of Units (SI). One Ohm is defined as the resistance between two points of a conductor when a constant potential difference of one volt applied between those points produces a current of one ampere. This foundational relationship is a key principle in Ohm's Law, which states that voltage (V) equals current (I) times resistance (R), or V = I * R.

Resistance is a fundamental concept in electrical engineering and electronics, as it helps determine how much current will flow in a circuit for a given voltage. Knowing the resistance allows technicians and engineers to design circuits that operate safely and effectively.

The other units mentioned, such as Wattt, Volt, and Farad, pertain to power, voltage, and capacitance, respectively, and do not represent resistance. Understanding the unique role of Ohm as the unit of resistance is essential for anyone working with electrical systems.