In the given circuits (a), (b) and (c), the potential drop across the two \({\mathrm{p\text-n}}\) junctions are equal in: 
        
1. both circuits (a) and (c)
2. circuit (a) only
3. circuit (b) only
4. circuit (c) only
Subtopic:  PN junction |
 65%
From NCERT
NEET - 2022
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The increase in the width of the depletion region in a \(\mathrm{p\text{-}n}\) junction diode is due to:

1. reverse bias only
2. both forward bias and reverse bias
3. increase in forwarding current
4. forward bias only
Subtopic:  PN junction |
 78%
From NCERT
NEET - 2020
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Out of the following which one is a forward-biased diode?

1.  
2.
3.
4.
Subtopic:  PN junction |
 84%
From NCERT
NEET - 2020
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In a \(\mathrm{p\text{-}n}\) junction diode, the change in temperature due to heating:

1. affects only reverse resistance.
2. affects only forward bias.
3. does not affect the resistance of the \(\mathrm{p\text{-}n}\) junction.
4. affects the overall \(\mathrm{V\text{-}I}\) characteristics of a \(\mathrm{p\text{-}n}\) junction.

Subtopic:  PN junction |
 75%
From NCERT
NEET - 2018
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Which one of the following represents the forward bias diode?

1.  
2.  
3.
4.
Subtopic:  PN junction |
 81%
From NCERT
NEET - 2017
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The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance \(R_1\) will be:
   
1. \(2.5~\text{A}\)
2. \(10.0~\text{A}\)
3. \(1.43~\text{A}\)
4. \(3.13~\text{A}\)

Subtopic:  PN junction | Applications of PN junction |
 86%
From NCERT
NEET - 2016
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Consider the junction diode as an ideal. The value of current flowing through \(AB\) is: 
   
1. \(10^{-2}~\text{A}\)
2. \(10^{-1}~\text{A}\)
3. \(10^{-3}~\text{A}\)
4. \(0~\text{A}\)

Subtopic:  PN junction |
 77%
From NCERT
NEET - 2016
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In the given figure, a diode \(D\) is connected to an external resistance \(R = 100~\Omega\) and an EMF of \(3.5~\text{V}\). If the barrier potential developed across the diode is \(0.5~\text{V}\), the current in the circuit will be:
  
1. \(30~\text{mA}\)
2. \(40~\text{mA}\)
3. \(20~\text{mA}\)
4. \(35~\text{mA}\)

Subtopic:  PN junction |
 75%
From NCERT
NEET - 2015
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If in a \(\mathrm{p\text{-}n}\) junction, a square input signal of \(10~\text{V}\) is applied as shown, 

 
then the output across \(R_L\) will be:

1. 2.
3. 4.
Subtopic:  PN junction |
 72%
From NCERT
NEET - 2015
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The barrier potential of a \(\mathrm{p\text{-}n}\) junction depends on: 

(a) type of semiconductor material 
(b) amount of doping 
(c) temperature 

Which one of the following is correct?
1. (a) and (b) only
2. (b) only
3. (b) and (c) only
4. (a), (b) and (c)

Subtopic:  PN junction |
 83%
From NCERT
NEET - 2014
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