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 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 |
 87%
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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The barrier potential of a \(\mathrm{p\text-n}\) junction diode does not depend on:

1. diode design 2. temperature
3. forward bias 4. doping density
Subtopic:  PN junction |
 75%
From NCERT
AIPMT - 2003
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Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is:

1. \(0.75~\text{A}\) 2. zero
3. \(0.25~\text{A}\) 4. \(0.5~\text{A}\)
Subtopic:  PN junction |
 88%
From NCERT
AIPMT - 2012
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For the given circuit of the \(\mathrm{p\text-n}\) junction diode, which of the following statements is correct?

         

1. In F.B. the voltage across \(R\) is \(V.\)
2. In R.B. the voltage across \(R\) is \(V.\)
3. In F.B. the voltage across \(R\) is \(2V.\)
4. In R.B. the voltage across \(R\) is \(2V.\)

Subtopic:  PN junction |
 81%
From NCERT
AIPMT - 2002
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When a forward bias is applied to a \(\mathrm{p\text-n}\) junction, then what happens to the potential barrier \(V_B,\) and the width of charge depleted region \(x\)?
1. \(V_B\) increases, \(x\) decreases 2. \(V_B\) decreases, \(x\) increases
3. \(V_B\)  increases, \(x\) increases 4. \(V_B\) decreases, \(x\) decreases
Subtopic:  PN junction |
 71%
From NCERT
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What is the reading of the ideal ammeters \(A_1\) and \(A_2\) connected in the given circuit diagram, if \(\mathrm{p\text-n}\) junction diodes are ideal?

    

1. \(2~\text A\)  and zero 2. \(3~\text A\)  and \(2~\text A\) 
3. \(2~\text A\)  and \(3~\text A\)  4. Zero and \(2~\text A\) 


 
Subtopic:  PN junction |
 84%
From NCERT
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Which one of the following represents the forward bias diode?

1.  
2.  
3.
4.
Subtopic:  PN junction |
 83%
From NCERT
NEET - 2017
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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 |
 78%
From NCERT
NEET - 2016
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