What unit is used to measure resistance?

Resistance in an electrical circuit is measured in ohms, which is represented by the symbol Ω. This unit quantifies how much a material opposes the flow of electric current. The concept of resistance is fundamental in Ohm's Law, which defines the relationship between voltage (volts), current (amperes), and resistance (ohms). In this context, ohmic resistance is considered a crucial property of electrical components, influencing how they behave under different voltage and current conditions.

The other options refer to different electrical concepts: volts measure electric potential, amperes measure current flow, and henries measure inductance, which all serve unique roles within electrical theory and applications. Understanding these distinctions helps in grasping fundamental electrical principles, critical for your training as a lineman apprentice.