Question

1. How do we decide that a given material is a good conductor
of electricity or is an insulator?​

Answer 1

Answer:

In a conductor, electric current canflow freely, in an insulator it cannot. Metals such as copper typifyconductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them. ... Most atoms hold on to their electrons tightly and are insulators