Question

What is the difference between resistance and resistivity of the conductor? What would happen to the resistance of a wire if it is stretched to double it's length? Justify your answer

Answer 1

Resistance tells you the specific number of ohms that a phsyical piece ofconductor has. Resistivity is the electrical property of a material. The resistanceof a specific length and cross sectional area piece of that material (e.g. like carbon, silver or copper) can be calculated using the resistivity property.

Answer 2

2nd answer is: As a wire gets longer its resistance increases, and as it gets thinner its resistance also increases because its cross sectional area decreases. Doubling the length will double the resistance, but the wire also must get thinner as it is stretched, because it will contain the same amount of metal in twice the length.