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Date: 21-10-2020
1106
Date: 18-10-2020
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Date: 8-5-2017
1446
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BIAS
In a p-n junction, when the n-type material is negative with respect to the p-type material, electrons flow easily from n to p. This is forward bias; the diode conducts well. When the polarity is switched so that the n-type material is positive with respect to the p-type material, it is in a state of reverse bias, and the diode conducts poorly.
When a diode is reverse-biased, electrons in the n-type material are pulled toward the positive charge, away from the junction. In the p-type material, holes are pulled toward the negative charge, also away from the junction. The electrons (in the n-type material) and holes (in the p-type material) become depleted in the vicinity of the junction. This impedes conduction, and the resulting depletion region behaves as a dielectric or electrical insulator.
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مخاطر عدم علاج ارتفاع ضغط الدم
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البحرين تفوز بجائزة أفضل وجهة للمعارض والمؤتمرات
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مدرسة دار العلم.. صرح علميّ متميز في كربلاء لنشر علوم أهل البيت (عليهم السلام)
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