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Gujarat Class 10 Answered

what is a free electron ? explain conducting and non conducting material.  
Asked by muzzammilshaikh326 | 20 Oct, 2018, 02:51: PM
answered-by-expert Expert Answer
In the electronic configuration of the atom, outermost shell contain valence electrons. Valence electrons are loosely attached to the nucleus of a atom. When small amount of external energy in form of heat or light is applied to the valence electrons then they get pulled away from the parent atom and becomes free.  Loosely bound valence elerons are pulled by electric field and become free electron. The force of attraction of the nucleus does not act on the free electron.The flow of free electrons in a material is called an electric current. The moving free electrons will transmit electric current from one point to other.  Materials which contain free electrons will conduct electric current. Materials which does not contain free electrons does not conduct electric current.
Answered by Thiyagarajan K | 22 Oct, 2018, 10:19: AM

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