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Because of freely moving of electrons in the material
conductors
Transparent materials allow light to freely pass through them. Translucent materials also allow light to pass through them, but change the colour of the light.
Materials that do not allow electric currents to pass are called insulators.
because they are conductors and conductors allow the electrons to flow around freely in the object (conductor). and also, why not?
Because of freely moving of electrons in the material
They are called "insulators" and include such materials as glass, rubber, plastic, nylon, dry wood, ceramic, air, etc.
conductors
Transparent materials allow light to freely pass through them. Translucent materials also allow light to pass through them, but change the colour of the light.
Freely moving electrons.
insulator...as opposed to a conductor which does allow electrons to travel freely within it.
A materiel that allows an electric charge to pass through it is an conducter (copper, for example)
Metals are materials in which particles (electrons) can freely move. If you mean bigger particles (such as atoms or molecules), then liquids and gasses allow easy movement
Note that "electricity" doesn't flow, only current does, which is one aspect of electricity, does. Current is the flow of electrons. Good conductors are metals, such as copper or aluminum. Materials that allow the flow of electrons, but not as freely as good conductors are known as semiconductors. These are primarily silicon or germanium, that is "doped" with specific types of impurities to allow their current to be better controlled by the application of a voltage. Heat will also increase the flow of electrons in a semiconductor.
Conductors, such as metals.
yes
Because such metals allow electricity to flow more freely through them than it can flow through most other things (wood, for example, is a poor conductor).