ICSE Class 9 Answered
Why are metals cood conductors of electricity?Explain in terms of resistance.
Asked by dr_pradip27121972 | 17 Nov, 2017, 21:08: PM
Expert Answer
- Conduction of current takes place due to the movement of the electrons.
- When metal atoms combine with each other, the outermost electrons lose contact with their parent atoms.
- The remaining positively charged atomic centers form an ordered structure while the outer electrons move freely around.
- These freely moving electrons, called conduction electrons, they can carry heat energy and electric charge easily throughout the metal, making metals good conductors of heat and electricity.
- But in case of the non metals, the electrons are held tightly by the nucleus, thus they cannot move easily.
- Resistance is the property of an electric path or circuit which resists (stops) the flow of electrons through it.
- In metal conductors, due to a higher number of conduction electrons, the resistance is less when compared to the resistance in non metallic conductors.
- Lesser the resistance, more is the flow of current thorugh a circuit, therefore, metals are good conductors of electricity.
Answered by Abhijeet Mishra | 20 Nov, 2017, 14:36: PM
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