Question

Which of the following materials has good conductivity?
1. Aluminium
2. Carbon
3. Silicon
4. Copper

Answer 1

Correct Answer - Option 4 : Copper

CONCEPT:

• Conductivity: The measure of the ease at which an electric charge can pass through a material is called electrical conductivity.
• Conductor: The material which has high conductivity is called the conductor.
• Non-conductor:  The material which has very low conductivity is called non-conductor.
  • Metal has high conductivity and non-metal has very low conductivity

​EXPLANATION:

• Electrical Conductivity is the evaluation of a material's ability to allow the transport of an electric charge.
• Silver is by far the most electrically conductive metal on earth. Since silver has only one valence electron which is free to move around with little resistance, it has great electrical and thermal conductivity.
• After silver, copper is the second most electrically conductive metal. Gold and Aluminium are other metals that are good conductors of electricity.