It seems like you might be asking about "ohm size" in the context of resistance, but the term "ohm size" isn't a standard term. However, I think you're referring to "resistance" and how it's measured in ohms (Ω).
In electrical engineering, **resistance** is a property of a material or component that resists the flow of electric current. It is measured in **ohms (Ω)**, named after the German physicist Georg Simon Ohm.
If you're asking about something specific like resistor sizes or how resistance relates to different physical components, here's how it works:
1. **Resistor Size**: Resistors come in various physical sizes, and their size can affect their power rating (how much power they can safely dissipate). The physical size and shape of a resistor may influence its resistance value, but the resistance itself is the main property being measured in ohms.
2. **Ohm's Law**: Ohm's Law relates voltage (V), current (I), and resistance (R) using the formula:
\[
V = I \times R
\]
Here, **R** is the resistance measured in ohms.
If you were thinking about something else or a specific application, let me know, and I can clarify further!