Question

Why doesn't electric charges move through an insulator easily?

Answer 1

Dear student,
The insulators does not conduct electric charges easily. It is because an object requires free electrons to move or conduct electric current.In order to conduct the current, the electrons must flow from valence band to conduction band with a certain energy gap in between them. But the energy gap in insulators is very large and therefore, electrons cannot cross this energy gap even if external energy is provided to them and thus insulators are unable to conduct electric charge through them easily.
Regards