Which materials act as poor conductors and what is the reason behind it?

Materials that act as poor conductors of electricity are known as insulators. Common examples include rubber, plastic, wood, glass, and air.

These materials do not allow electric current to pass through them easily because they lack free electrons. In conductive materials like metals, electrons can move freely and carry charge. However, in insulators, electrons are tightly bound to atoms, which prevents the flow of electric current.

As a result, insulators are widely used in electrical applications for safety purposes, such as covering wires and protecting users from electric shocks.