Question

If the length of a conductor having resistivity 1.5 x 10^-8 is doubled its new resistivity will be

Answer 1

Explanation:

Actually resistivity is independent of length.

but there is also another case which is inversely proportional to length

.

Answer 2

Resistivity will remain the same even if the length is doubled i.e = 1.5 × 10⁻⁸

• Resistance (R) = ρl/A  where, ρ = resistivity, l = length of the conductor, A = cross-section area of conductor
• Resistance depends on the length, area, and resistivity of the conductor.
• Resistivity is a property of the conductor.
• It depends only on the material or nature of the conductor and temperature.
• It is independent of the length and area of the conductor.