Question

resistivity does not change if
a] material is changed
b] temperature is changed
c] the shape of the resistor is changed
d] both material and temperature is changed

Answer 1

c the shape of the resistor is changed

Answer 2

Answer:

We know that resistance for a material is proportional to the resistivity of the material, proportional to the length and inversely proportional the area of cross-section

$R=\dfrac{\rho l}{A}$

Where $\rho$ is the resistivity

So resistivity will be,

$\rho=\dfrac{RA}{l}$

So, resistivity will depend on the area and length

But it does not depend on the shape of the resistor

So option (C) the shpe of resistor is changed is correct.