2007-01-28 20:54:22 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
it bcoz only metals possess free electrons which can transmit electricity, while nonmetal does not have this tendency of free electrons.
these free electrons moves randomly witin the metal when no potentil ls applied , oce the current is flown these electrons align themselves in a line and start moving opp. to dir of current i.e. from -ve to +ve conducting electricity.
2007-01-29 00:54:34 · answer #1 · answered by divas 3 · 0⤊ 2⤋
"Metals are good conductors because they have unfilled space in the valence energy band. In the absence of an electric field, there are electrons traveling in all directions with many different velocities up to the Fermi velocity (the velocity of electrons at the Fermi energy). When an electric field is applied, a slight imbalance develops and mobile electrons flow. Electrons in this band can be accelerated by the field because there are plenty of nearby unfilled states in the band."
2007-01-29 08:13:43 · answer #2 · answered by Timbo 3 · 0⤊ 1⤋
It is so because, the metals have electrons inside them, while those who do not conduct, do not have electrons inside them.
2007-01-29 07:41:01 · answer #3 · answered by Qyn 5 · 0⤊ 1⤋
electricity flow due to free electrons present in metal
i no. of free e are diffrent in diffrent metal some don't have and they r known as bad conductors saome have plenty of them r known as gud conductor
2007-01-29 05:13:20 · answer #4 · answered by n nitant 3 · 0⤊ 0⤋
who cares?
2007-01-29 04:58:56 · answer #5 · answered by Soundguy 2 · 0⤊ 4⤋