I found this formula for calculating the resistivity of a certain thing.

So as quoted above, to get the resistivity of a certain thing, you need to multiply the length to resistance (measured in Ω) and the product will be divided by a cross section area.Resistance is length X resistivity / Cross section area

Now, how could I measure the resistivity of a wood? Most says it's a millions Ω but I need clarification.

Secondly, cross section area? I don't know the formula to get the cross section area. Please tell it to me.

Thirdly, is there any standard for the unit of length? Isn't it in meter or?

Fourthly, I hope for your answers. I really need. This, Whoop! What is the correct resistivity of a wood?

Postscript: My teacher taught us, told us rather, that the Greek symbol Ω is alpha. I couldn't tell her that it is omega as she might give me the floor to teach.

Yours truly,

Lightfire