Question

how does the value of resistivity of a conductor changes on mixing impurities to it​

Answer 1

Answer:

A very simplified way to look at it is that electricity is flow of electrons. Impurities are like obstacles to the free flow of electrons. These obstacles are what is termed as resistance of the material. Imagine water flowing through a pipe. Moss in the pipe causes water to choke up or flow with less velocity. A clean pipe can make water flow faster. In case of electricity, water is the electrons. Conductor is the pipe.