What does 'OHM' refer to in the context of electricity?

In the context of electricity, 'OHM' refers to resistance. The unit is named after the German physicist Georg Simon Ohm, who formulated Ohm's Law, which states that the current flowing 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 resistance impedes the flow of electric current within a circuit.

Understanding resistance is crucial for tree trimmers and electricians alike, as it can influence how well electrical systems operate, determining how much current can flow through wires and devices. Resistance is measured in ohms, and the greater the resistance, the less current will flow for a given voltage. This principle is foundational in designing and maintaining electrical systems safely and effectively.