Why do filaments of bulbs heat up?

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SUMMARY

The discussion centers on the heating of a filament in a light bulb, specifically addressing the interactions between electrons and metal atoms versus metal ions. It is established that in conductive materials, electrons collide primarily with metal atoms rather than fully ionized metal ions. The outermost electrons of metal atoms become delocalized, allowing them to move freely and contribute to electrical conductivity. This understanding is crucial for explaining the resistance and heating effect observed in filaments when electric current passes through.

PREREQUISITES
  • Understanding of electrical conductivity in metals
  • Basic knowledge of atomic structure and electron behavior
  • Familiarity with the concept of ionization
  • Awareness of the relationship between resistance and heat generation in conductors
NEXT STEPS
  • Research the role of electron mobility in metallic conductors
  • Study the principles of electrical resistance and Joule heating
  • Explore the differences between metal atoms and metal ions in conductivity
  • Learn about the microscopic models of electricity in solid-state physics
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Students studying physics, educators teaching electricity concepts, and anyone interested in the principles of electrical resistance and heating in conductive materials.

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Homework Statement


This is not entirely a homework question but more a question about a homework assignment. We were asked to find out why a filament of a bulb heats up by talking about microscopic ideas. This is a link to a website that contains the relevant information under the heading 'higher tier only'

http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa/electricity/resistancerev4.shtml

Homework Equations


None

The Attempt at a Solution


I just wanted to ask if the electrons collide with metal IONS or metal ATOMS. I have found other sources that have said the electrons collide with the metal atoms and surely only one is correct. I thought a metal ion is when an atom has completely had an electron removed. I thought conductors just have electrons that are free to drift rather than electrons that have been completely removed?
 
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The metal atoms are ionized in the metal. Their outermost electrons leave their parent atoms and belong to the whole metal, moving about freely.
Ion is a charged particle, it contains more or less electrons than there are protons in the nucleus. The metal is usually neutral, the electrons are not completely removed from it, they are removed only from the atoms.
 

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