Question

If a wire is increased to 4 times its original length, by what factor does the resistivity change?

Answer 1

No resistivity won't change

Answer 2

If a wire is increased to 4 times its original length, the resistivity would remain constant.

• Resistance will increase 4 times and resistivity will remain constant.
• The property by which conductors tend to oppose the flow of electrons is termed resistance. It is represented by ohm(Ω)
• The strength by which a conductor repels the flow of electrons is termed resistivity.  It is represented by rho(ρ).
• The resistance is directly proportional to the object's length and inversely proportional to the area of the object's cross-section.
• Resistivity is a characteristic property. It does not vary with increase or decrease in dimensions.
• Hence, when the length of wire is increased, only resistance increases.