Sub-topic 1
2024 · National Preliminary
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Physical property riddle: semiconductors
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Sub-topic 2
2026 · National One-Eighth
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Riddle: doping (semiconductor fabrication process)
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Sub-topic 3
2026 · National Preliminary
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Thermoelectric effects: seebeck, peltier and thomson
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Sub-topic 4
2013 · National Preliminary
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How electrical conductivity varies with rising temperature: metal, semiconductor and insulator
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Sub-topic 5
2014 · National Quarterfinal
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Ohmic vs non-ohmic devices: incandescent lamps, pn junctions and metallic conductors (true/false)
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