PN-junction diode works as a insulator, if connected

(1) To A.C.                             

(2) In forward bias

(3) In reverse bias                   

(4) None of these

Subtopic:  Applications of PN junction |
 84%
From NCERT
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The reverse biasing in a PN junction diode

1. Decreases the potential barrier

2. Increases the potential barrier

3. Increases the number of minority charge carriers

4. Increases the number of majority charge carriers

Subtopic:  PN junction |
 82%
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The electrical resistance of depletion layer is large because:

1. It has no charge carriers

2. It has a large number of charge carriers

3. It contains electrons as charge carriers

4. It has holes as charge carriers

Subtopic:  Energy Band theory |
 59%
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In the circuit given below, the value of the current is

(1) 0 amp                         

(2) 10-2 amp

(3) 102 amp                       

(4) 10-3amp

Subtopic:  PN junction |
 84%
From NCERT
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The PN junction diode is used as

(1) An amplifier                       

(2) A rectifier

(3) An oscillator                       

(4) A modulator

Subtopic:  Applications of PN junction |
 71%
From NCERT
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Two \(\mathrm{P\text-N}\) junctions can be connected in series by three different methods as shown in the figure. If the potential difference in the junctions is the same, then the correct connections will be:

 

1. In the circuit (1) and (2)      
2. In the circuit (2) and (3)
3. In the circuit (1) and (3)       
4. Only in the circuit (1)
Subtopic:  PN junction |
 64%
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In the depletion region of an unbiased P-N junction diode there are

(1) Only electrons

(2) Only holes

(3) Both electrons and holes

(4) Only fixed ions

Subtopic:  PN junction |
 52%
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On increasing the reverse bias to a large value in a PN-junction diode, current

1. Increases slowly                 

2. Remains fixed

3. Suddenly increases             

4. Decreases slowly

Subtopic:  PN junction |
 60%
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In the case of forward biasing of PN-junction, which one of the following figures correctly depicts the direction of flow of carriers

Subtopic:  PN junction |
 60%
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A semiconductor device is connected in a series circuit with a battery and a resistance. A current is found to pass through the circuit. If the polarity of the battery is reversed, the current drops almost to zero. The device may be

(1) A P-type semiconductor               

(2) An N-type semiconductor

(3) A PN-junction                               

(4) An intrinsic semiconductor

Subtopic:  PN junction |
 83%
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