Define OHM in the context of electrical current.

In the context of electrical current, OHM is defined as the unit of measurement for resistance. This means that an OHM quantifies how much opposition a substance offers to the flow of electric current. When discussing electrical circuits, understanding resistance is crucial because it affects how much current will flow for a given voltage. According to Ohm's Law, which states that voltage equals current times resistance (V = IR), an increase in resistance will result in a decrease in the current flow, assuming that the voltage remains constant. This relationship highlights the importance of OHMs in determining how circuits function and are designed to ensure safe and effective operation.