How does the resistance of a wire depend upon the wire


1. How does the resistance of a wire depend upon the wire diameter?
2. How does the resistance of a wire depend upon the wirelength?
3. Why is it useful to have a resistance measuring procedurethat uses only very small currents? What specific error is avoidedby the use of small currents?

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Physics: How does the resistance of a wire depend upon the wire
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