If the reverse bias in a junction diode is changed from \(5\) V to \(15\) V then the value of current changes from \(38\) \(\mu \text{A}\) to \(88\) \(\mu \text{A}.\) The resistance of junction diode will be:
1. \(4\times10^{5}\) 
2. \(3\times10^{5}\)
3. \(2\times10^{5}\)
4. \(10^{6}\)

Subtopic:  PN junction |
 84%
From NCERT
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The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance R1 will be:
     

1. 2.5 A 2. 10.0 A
3. 1.43 A 4. 3.13 A
Subtopic:  PN junction |
 86%
From NCERT
NEET - 2016
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What is the reading of the ideal ammeters A1 and A2 connected in the given circuit diagram, if p-n junction diodes are ideal?

   

1. 2 A and zero

2. 3 A and 2 A

3. 2 A and 3 A

4. Zero and 2 A

Subtopic:  PN junction |
 83%
From NCERT
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Of the diodes shown in the following diagrams, which one of the diodes is reverse biased?
 

1. 2.
3. 4.

Subtopic:  PN junction |
 83%
From NCERT
AIPMT - 2004
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A potential barrier of 0.50 V exists across a p-n junction. If the depletion region is 5.0×10-7 m wide, the intensity of the electric field in this region is:

1. \(1.0 \times 10^6 \mathrm{~V} / \mathrm{m}\) 2. \(1.0 \times 10^5 \mathrm{~V} / \mathrm{m}\)
3. \(2.0 \times 10^5 \mathrm{~V} / \mathrm{m}\) 4. \(2.0 \times 10^6 \mathrm{~V} / \mathrm{m}\)
Subtopic:  PN junction |
 82%
From NCERT
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For the given circuit of the P-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 |
 79%
From NCERT
AIPMT - 2002
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Reverse-bias applied to a junction diode:

1. lowers the potential barrier
2. raises the potential barrier
3. increases the majority carrier current
4. increases the minority carrier's current

Subtopic:  PN junction |
 74%
From NCERT
AIPMT - 2003
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The depletion layer in the P–N junction region is caused by:

1. the drift of holes
2. diffusion of charge carriers
3. migration of impurity ions
4. drift of electrons

Subtopic:  PN junction |
 76%
From NCERT
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The barrier potential of a p-n junction diode does not depend on:

1. diode design

2. temperature

3. forward bias

4. doping density

Subtopic:  PN junction |
 73%
From NCERT
AIPMT - 2003
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When a forward bias is applied to a p-n junction, then what happens to the potential barrier VB, 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 |
 69%
From NCERT
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