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# AS Level Resistivity Question watch

1. Hey Everyone,
I would appreciate some help on the following question:

A 2m length wire has a resistance of 2 Ohms and a cross-sectional area of 2 mm(squared).
What is the resistivity of the material from which it is made?

I know that p(resistivity) = Cross Sectional Area x Resistance
Length

However, the Cross Sectional area needs to be in m(squared) and not mm(squared). So, how would I convert it?

With regards,
Savio
2. There are 1000 mm in 1 m.

There are 1000² mm² in 1 m².
3. (Original post by Mr M)
There are 1000 mm in 1 m.

There are 1000² mm² in 1 m².
Thank you very much

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