Okay we just start electricity in class and almost instantly we got a small lab. I did part of it, but I am having trouble with some of the questions and have no idea where to start from.(adsbygoogle = window.adsbygoogle || []).push({});

The first question is Determine the R value of a resistor that uses 4 m. of copper wire with a thickness of 1/3x the one used in the lab.

Now I have to find the ratio, but how? Also the resistor board used is 1 meter. I'm not sure, but would it be

R2= Resisitivity x 4 m. / Pie (4r)^2

R1= Resistivity x 1 meter / Pie r^2

How do I find the ratio?

2nd question was "Determine how much wider the diameter of the thick nichrome wire is in comparison to the thin nichrome wire".

How would I start such a question?

3rd question was "If the resistivity of nichrome is 100x10^-8 ohms/meter, determine the resistivity of copper"

How would I start to solve this question also?

Thanks (I'm not looking for an answer, Just how to start solving it)

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# Homework Help: Help with some Resistance Questions

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