Modelová Otázka ID 3501 - 
Která z následujících dvojic „elektrické zařízení/součástka – podstata tohoto zařízení / této součástky“ je nesprávná?
Správná odpověď je: C
Dioda je polovodičová součástka s jedním PN přechodem, která slouží k usměrňování elektrického proudu. Tranzistor je polovodičová součástka se dvěma PN přechody, jejíž hlavní využití je funkce zesilovače elektrického proudu. V oscilačním (LC) obvodu dochází po nabití stejnosměrným proudem ke vzniku elektromagnetického kmitání, jehož projevem je střídavý elektrický proud. Termočlánek je zdroj elektrického proudu, který k tvorbě elektrického napětí využívá gradientu teplot v kovovém vodiči, a to na základě Peltier‑Seebeckova (termoelektrického) jevu.
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