Resistance is measured in what unit?

Resistance is measured in ohms, which is the standard unit of measurement in the International System of Units (SI). This unit is named after Georg Simon Ohm, a German physicist known for formulating Ohm's Law, which states that the current 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.

Understanding this concept is essential for gas technicians, as resistance plays a significant role in electrical systems, including those found in gas appliances and equipment. Electrical resistance affects the flow of current in circuits, which can influence the operation and safety of various gas heating systems.

In contrast, joules are a measure of energy, watts are a measure of power (which is energy per unit time), and amps are a measure of electrical current. Each of these units addresses a different aspect of electrical phenomena, but none represent resistance itself. Therefore, ohms is the correct choice for measuring resistance.