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Pomoc s výpočtem příkladu:
Stanovte teplotu wolframového vlákna žárovky při svícení. Při teplotě 20°C je odpor vlákna 53 Ω.
Při napětí 45 V prochází žárovkou proud 0,5 A. (αwolfram = 0,0041 K
-1)
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