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Консультация № 200675
19.04.2021, 12:03
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
Во сколько раз возрастет сопротивление полупроводника из чистого германия, если его температуру понизить с 300 К до 30 К?
Во сколько раз возрастет сопротивление полупроводника из чистого германия, если его температуру понизить с 300 К до 30 К?
Обсуждение
20.04.2021, 13:13
общий
это ответ
Здравствуйте, Dizi!
Предлагаю Вам следующее решение задачи.
Дано:
К, 
К -- начальная и конечная температуры полупроводника из чистого германия.
Определить:
-- отношение сопротивлений проводника при указанных температурах.
Сопротивление
полупроводника есть величина, обратная его электропроводности 
Электропроводность полупроводника пропорциональна числу 
термически возбуждённых электронов, которое, в свою очередь, пропорционально величине 
где 
эВ
(Дж) -- ширина запрещённой зоны (энергия активации собственной проводимости) для германия; 
(Дж/К) -- постоянная Больцмана. [1, 2] Поэтому
Ответ:
Литература
1. Детлаф А. А., Яворский Б. М. Курс физики: Учеб. пособие для втузов. -- М.: Высш. шк., 1989. -- 608 с.
2. Орир Дж. Физика: учебник. -- М.: КДУ, 2010. -- 752 с.
Предлагаю Вам следующее решение задачи.
Дано:
К, К -- начальная и конечная температуры полупроводника из чистого германия.Определить:
-- отношение сопротивлений проводника при указанных температурах.Решение
Сопротивление
полупроводника есть величина, обратная его электропроводности Электропроводность полупроводника пропорциональна числу термически возбуждённых электронов, которое, в свою очередь, пропорционально величине где эВ (Дж) -- ширина запрещённой зоны (энергия активации собственной проводимости) для германия; (Дж/К) -- постоянная Больцмана. [1, 2] ПоэтомуОтвет:
Литература
1. Детлаф А. А., Яворский Б. М. Курс физики: Учеб. пособие для втузов. -- М.: Высш. шк., 1989. -- 608 с.
2. Орир Дж. Физика: учебник. -- М.: КДУ, 2010. -- 752 с.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
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