Working out resistivity R=pL/A

[Lee Gold]

Examples Please

 

[telectrix]

can you be more specific in what your question is.

 

[telectrix]

p = ( R x A ) / L.
i'e . the resistivity of a conductor, p , is proportional to R ( measured resistance ) x A ( (csa) divided by L (length).

so if you know R, A, and L, you can work out p.

 

[Loki]

Here's an example

 

[Lee Gold]

Here's an example

View attachment 38414

What about the power factor how do you know what factor to use say 10-6?

 

[Loki]

some books/websites might use a different power factor
10-6 0.0178
10-7 0.178
10-8 1.78
10-9 17.8
As you can see all that really changes is where the decimal point goes.

I tend to use the 10-6 because its easier cancelling out as you could see in the example I gave.

Hope that helps?

Michael

 

[Lee Gold]

some books/websites might use a different power factor
10-6 0.0178
10-7 0.178
10-8 1.78
10-9 17.8
As you can see all that really changes is where the decimal point goes.

I tend to use the 10-6 because its easier cancelling out as you could see in the example I gave.

Hope that helps?

Michael

Got you thanks mate