Question

In insulators, the electrons are:

Options

• Tightly bound to the nuclei of their atoms

• Completely absent from the material

• Loosely bound and drifting constantly

• Free to move throughout the volume of the material

Answer 1

In insulators, electrons are tightly bound to the nuclei of their atoms, so there are no free electrons to carry current. Insulators have only a negligibly small number of free electrons.