Conductors and Insulators
- Materials which allow electric current to pass through them are called conductors of electricity. Examples are iron nail, key, safety pin, water, human bodyetc.
- Materials which do not allow electric current to pass through them are called insulators of electricity. Examples are rubber, plastic, glass, air, clothetc.
- Conductors are mainly metallic while insulators are non-metallic.
- Electrical devices are made up of conductors. To avoid passing of the current to human body during their handling, these devices have a covering of insulators (like plastic, wood, aluminum) over them.