हिंदी

What Happens to the Width of Depletion Player of a P-n Junction When It is (I) Forward Biased, (Ii) Reverse Biased? - Physics

Advertisements
Advertisements

प्रश्न

What happens to the width of depletion player of a p-n junction when it is (i) forward biased, (ii) reverse biased?

Advertisements

उत्तर

(i) In forward bias, the width of the depletion layer decreases.

(ii) In reverse bias, the width of the depletion layer increases.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2010-2011 (March) All India Set 3

वीडियो ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्न

Colour of light emitted by LED depends upon__________________ .

  1. its forward bias
  2. its reverse bias
  3. the band gap of the material of semiconductor
  4. its size

Meeta's father was driving her to school. At the traffic signal, she noticed that each traffic light was made of many tiny lights instead of a single bulb. When Meeta asked this question to her father, he explained the reason for this.

Answer the following questions based on above information:

(i) What were the values displayed by Meeta and her father?

(ii) What answer did Meeta's father give?

(iii) What are the tiny lights in traffic signals called and how do these operate?


If a small voltage is applied to a p-n junction diode, how will the barrier potential be affected when it is (i) forward biased


Describe, with the help of a circuit diagram, the working of a photodiode.


How is a photodiode fabricated?


Draw V − I characteristics of a p-n junction diode. Answer the following questions, giving reasons:

(i) Why is the current under reverse bias almost independent of the applied potential up to a critical voltage?

(ii) Why does the reverse current show a sudden increase at the critical voltage?

Name any semiconductor device which operates under the reverse bias in the breakdown region.


Draw the circuit diagram of an illuminated photodiode in reverse bias. How is photodiode used to measure light intensity?


An ideal diode should pass a current freely in one direction and should stop it completely in the opposite direction. Which is closer to ideal-vacuum diode or a p-njunction diode?


Pressure P varies as P = `alpha/beta "exp" (- (alpha x)/"k"_"BT")`, where x denotes the distance, kB is the Boltzmann's constant, T is the absolute temperature and α and β are constant. The dimension of β is ______.


A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. lt can detect a signal of wavelength ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×