What does the symbol 'Ω' represent in electrical terms?

The symbol 'Ω' is the official unit of electrical resistance known as the ohm. This unit quantifies how strongly a material resists the flow of electric current. When one volt (V) of electrical potential difference causes a flow of one ampere (A) through a resistor, that resistance is one ohm. Therefore, this symbol directly relates to Ohm's Law, which states that voltage equals current times resistance (V = I × R). Understanding this relationship is fundamental in electrical engineering and circuits, as it helps in analyzing how different components behave in various electrical scenarios. The other units mentioned—coulomb, farad, and volt—represent different electrical concepts such as charge, capacitance, and potential difference, respectively, and therefore do not correspond to the resistance indicated by the 'Ω' symbol.