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  2. Physics Demonstrations and Equipment
  3. Electricity and Magnetism
  4. Semiconductors and Tubes

Semiconductors and Tubes Topic

Semiconductors

Concept 1 demo
Three semiconductor devices: photronic cell (left), silicon solar cell in case (center), and Hall effect probe on metal bracket (right)

Semiconductor Devices

Three semiconductor devices illustrate photovoltaic energy conversion and charge carrier behavior. Students observe how light generates current in solar and photronic cells, and how the Hall effect distinguishes electron from …

Tubes

Concept 1 demo
Demonstration triode: large glass vacuum tube mounted vertically on a black base with control knobs for filament, plate, and grid voltages
Safety

Demonstration Triode

A demonstration triode with phosphor-coated plate makes electron flow visible. Students observe thermionic emission from the heated filament and see how grid voltage controls current to the plate, illustrating the …

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