Question

Resistivity of pure metal is:

Answer 1

Hint: In this question, we will study about the basics of resistivity and then we will know about the resistivity of pure metal. Further, we will discuss the basics of a simple electrical circuit and series and parallel circuit.

Complete step-by-step answer:
As we know that the resistivity of a material increases as a result of imperfections, like defects, impurities, grain boundaries, and dislocations.
 Also, there is another approach for reducing resistivity which involves the simultaneous application of heat and pressure after crystal growth, this can also enhance the crystallinity of the metal and thereby significantly reduce the resistivity.
So, we can say that the resistivity of alloys is generally higher than that of pure metals, and increases with impurity contamination.

Additional Information: We should know that in a series circuit, the output current of the first resistor flows into the input of the second resistor; so, the current is the same in each resistor whereas In a parallel circuit, all of the resistor are on connected together on one side and all the leads on the other side are connected together.
In a circuit if the resistance is constant over a range of voltage, then I = V/R, can be used to predict the behavior of the material. This involves DC current and voltage, it is the same for the resistors. Further, a material obeys Ohm's law or does not obey; the resistance of the material can be described in terms of its bulk. The resistivity, and the resistance both, is temperature dependent. Over certain ranges of temperature, this temperature dependence can be predicted from resistance.

Note: We should remember that the resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents. Also, high resistivity shows the poor conduction. Internal resistance of a circuit refers to the opposition to the flow of current offered by the cells and batteries themselves thereby, resulting in the generation of heat. Internal resistance and resistance both are measured in Ohms.