Part IA Paper 3 Linear Circuits and Devices

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Part IA Paper 3Linear Circuits and Devices
David Holburn dmh_at_eng.cam.ac.uk

• SEM inspection of incandescent lamps
• You can find a pointer to an HTML version of this
  presentation at http//www.eng.cam.ac.uk/dmh

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Scanning Electron Microscope
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Filament

• Extrusion marks made during manufacture
• (high magnification)

Tungsten filament showing tight coiled
construction
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Filament near end-of-life

• Effects of evaporation after some hundreds of
  hours