Question

The resistance of an object depends on its :

• A. shape
• B. material of which it is composed
• C. size
• D. all of the above

Answer 1

The correct option is D all of the above

Let material has a resistance of R.
Let the cross sectional area be A.
Let the length of the wire be $l$.
Now the resistance of a wire can be expressed as:
$R=\rho \frac{l}{A}$
Where resistivity is $\rho$.
Resistivity depends on the nature of material and on temperature. So at same temperature resistance of a material depends on shape (cross sectional area), size (length) and material.