Conductors and Electrical Conductivity
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Questions and Answers

What is the temperature coefficient of resistance for conducting materials?

  • Zero
  • Positive (correct)
  • Depends on the material
  • Negative

What is the characteristic of the energy gap between conduction band and valence band in conductors?

  • There is a small forbidden energy gap
  • The energy gap varies with temperature
  • There is a large forbidden energy gap
  • There is no forbidden energy gap (correct)

Why do metals work as good conductors of electricity?

  • Due to the high density of protons
  • Due to the presence of positively charged ions
  • Due to the random movement of free electrons (correct)
  • Due to the presence of forbidden energy gap

Study Notes

Temperature Coefficient of Resistance

  • In conducting materials, the temperature coefficient of resistance is positive, meaning an increase in temperature increases the resistance.

Conductor Energy Gap

  • In conductors, there is no energy gap or a very small energy gap between the conduction band and valence band.

Metals as Conductors

  • Metals work as good conductors of electricity because their atoms have a "sea of delocalized electrons" that can move freely, allowing the flow of electric current.

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Description

Test your knowledge about conductors and electrical conductivity with this quiz. Learn about materials that are good conductors of electricity, the behavior of free electrons in a conductor, and the characteristics of conducting materials.

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