Question

Copper is the preferred material for making wire because of its low ____
A. Resistivity
B. Conductivity
C. Density
D. Charge

Answer 1

Hint: Connection wires can be made of any material which can conduct electricity. It is not only the conductivity that decides the best among the materials, but also other properties, including material properties, current conducting capacities etc.

Complete step by step answer:
The most commonly used material to make connection wires is Copper. Whether it be housing wires or the connections in electronic devices, almost all the connection wires in the market are made using Copper.
Copper has low electrical resistance, and low resistance means low resistivity. We can know about it from the following relation:
We all know that the resistance of a wire is given by:
$R = \rho \dfrac{l}{A}$
Here, R is the resistance, $\rho $ is the resistivity, l is the length of the wire, and A is the cross-sectional area of the wire.
Since the copper wire resistance is less as it is a conductive material, its resistivity is also less as resistance is directly varying with the resistivity.
Resistivity is the measure of how much an electrical conductor opposes the flow of current through it. It means that Copper allows the current flow without any interruption.
If the resistivity is low, therefore its conductivity is high.
Density means the amount of matter is packed per unit volume and has no direct relation with current flow.
Charge means the gain or removal of electrons, which makes an atom negative or positively charged.
Therefore, the Copper is used to make wire due to its low resistivity and the correct option (A).

Note: Resistivity is the material's characteristic property and it only depends on the nature of the material and temperature. We must remember that resistivity is independent of length and area of the cross section of material.