Calculate copper plate resistance

[robhlee]

If I have a sheet of copper, how can i calculate its resistance? do i just take the surface area of the thin side and compare it on an AWG chart?

 

[berkeman]

It depends in which axis you want to do the calculation, but in all cases you would just use the resistivity formula:

$$R = \frac{\rho L}{A}$$

Where $$\rho$$ is the resistivity in Ohm*meters

http://en.wikipedia.org/wiki/Electrical_resistance

 

[ravenprp]

Calculating the resistance of a copper plate is not as simple as comparing its surface area to an AWG chart. Resistance is determined by a combination of factors including the material's resistivity, the dimensions of the object, and the temperature. In the case of a copper plate, the resistivity of copper is a constant value, but the dimensions and temperature can vary.

To calculate the resistance of a copper plate, you will need to use the formula R = ρL/A, where R is the resistance, ρ is the resistivity of copper (1.68 x 10^-8 Ωm), L is the length of the copper plate, and A is the cross-sectional area of the plate.

If you have a thin sheet of copper, you can calculate its resistance by measuring the length and width of the sheet and using the formula above. Keep in mind that the thickness of the sheet will also affect the resistance, so it is important to measure and include that in your calculations.

Comparing the surface area of the thin side of the copper plate to an AWG chart will not accurately determine the resistance. AWG (American Wire Gauge) is a standard used for measuring the diameter of wire, not the surface area of a plate. Additionally, AWG charts are typically used for solid wire, not flat sheets.

In summary, to accurately calculate the resistance of a copper plate, you will need to use the formula R = ρL/A and measure the dimensions of the plate. It is also important to note that the resistance may change if the temperature of the copper plate changes.