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  1. Difference between Resistance and resistivity - Physics Forums

    Sep 13, 2009 · The relationship indicates that resistance increases with length and decreases with area, highlighting the importance of geometry in electrical applications. Understanding …

  2. Resistance, Current, two cylinders - Physics Forums

    Oct 6, 2011 · The discussion emphasizes the need to integrate the differential resistance elements to compute total resistance accurately, with the thickness of each element …

  3. What is the difference between resistance and resistivity

    Apr 26, 2017 · What is the difference between resistance and resistivity ?? I have studied that the electric resistance is directly proportional to length of material and inversely proportional to …

  4. Understanding the Difference: Resistivity vs. Resistance

    Feb 17, 2009 · For example, iron has a resistivity of 1.0×10^-7 ohm×m and a resistance of 9 ohms. It's important to note that resistivity and resistance are measured in different units. …

  5. Difference between ohmic and non ohmic resistors - Physics Forums

    Mar 12, 2016 · I was reading about ohmic and non-ohmicresistors, but I'm unsure as to what thedifference between them is. I understand that ohmic devices have a constantresistance, …

  6. Resistance Differences: Nichrome vs. Copper Wire - Physics Forums

    Jun 9, 2021 · Nichrome wire has a higher resistance than copper, leading to a greater potential difference when both are connected to a constant voltage source like a household outlet. …

  7. What is the Correct Definition of Dynamic Resistance and …

    Mar 30, 2009 · The concept of dynamic resistivity lacks a straightforward definition, but it can be expressed as ρd = d (Iρ)/dI, resulting in ρd = ρ + I dρ/dI. Another proposed definition for …

  8. Solving a Tungsten Filament Temperature Problem - Physics Forums

    Oct 16, 2005 · The initial resistance of the filament at room temperature is provided, but the user struggles with applying the correct formulas and understanding the difference between …

  9. Resistance of 2 materials, different resistivity, combined

    Aug 21, 2017 · To determine the equivalent resistance of a 60-cm gold wire soldered to a silver wire of the same length, the problem requires calculating the resistances of the individual …

  10. Potential difference and current - Physics Forums

    Feb 12, 2007 · Homework Statement A typical cell membrane is 8.0 nm thick and has an electrical resistivity of 1.3 10^7 m. If the potential difference between the inner and outer surfaces of a …