- 1(current)
Q. No.In the circuit shown in the diagram given below, R is a small resistor, Vi is the input voltage between A & B while Vo is the output voltage between C & D.
Consider the following two statements and mark the correct option.
(I) If Vi > 2 V, then Vo = Vi
(II) If Vi < 2 V, then Vo = 2 V
1. I is true.
2. II is true.
3. I and II are both true.
4. I and II are both false.
Consider the following two statements and mark the correct option.
(I) If Vi > 2 V, then Vo = Vi
(II) If Vi < 2 V, then Vo = 2 V
1. I is true.
2. II is true.
3. I and II are both true.
4. I and II are both false.
Subtopic: Â PN junction |
From NCERT
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The dynamic resistance of a diode is given by \(R=\frac{26}{i(mA)}~\Omega,\) where \(i\) is the diode current.
| Statement I: | If the current through the diode increases, then the dynamic resistance decreases. |
| Statement II: | If the temperature of the diode is increased, with the potential difference fixed, the dynamic resistance decreases. |
| 1. | Statement I is incorrect and Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct and Statement II is incorrect. |
Subtopic: Â PN junction |
 68%
From NCERT
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Hints
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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: Â PN junction |
 83%
From NCERT
NEET - 2014
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In the following figure, the diodes which are forward biased are:
| (a) |  |
| (b) |  |
| (c) |  |
| (d) |  |
1. (a), (b) and (d)
2. (c) only
3. (a) and (c)
4. (b) and (d)
Subtopic: Â PN junction |
 83%
From NCERT
AIPMT - 2011
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
In an unbiased - junction diode
1. p-type side is at higher potential than n-type side
2. p-type side is at lower potential than n-type side
3. Electric field is directed from side to side
4. Both 2 & 3
Subtopic: Â PN junction |
 59%
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NEET 2023 - Target Batch - Aryan Raj Singh
The \((I-V)\) characteristics of a \(p-n\) junction diode is as shown. If \(R_1\) and \(R_2\) be the dynamic resistance of the \(p-n\) junction when (i) a forward bias of \(1\) volt is applied and (ii) a forward bias of \(2\) volts is applied respectively, then \(\frac{R_1}{R_2}=?\)
1. \(160\)
2. \(16\)
3. \(1.6\)
4. \(0.16\)
Subtopic: Â PN junction |
 72%
From NCERT
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The voltage \(V_{AB}=20~V\) at its peak value, and is sinusoidal in time. The current \(i\) (in amperes), when plotted as a function of time, is given by:
(Consider the diodes as ideal.)
(Consider the diodes as ideal.)
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Â PN junction |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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The current-voltage characteristic of an ideal \(\mathrm{p \text{-}n}\) junction diode is given by the graph as shown in the following figure:
This diode is connected with a resistance of \(5~\Omega\) in series with it as shown below:
Which of the following shows the dependence of the voltage \(V_{AB}\) and the current \(i\), when the diode is forward-biased? (\(V_{AB}\) in volt, \(i\) in ampere)
This diode is connected with a resistance of \(5~\Omega\) in series with it as shown below:
Which of the following shows the dependence of the voltage \(V_{AB}\) and the current \(i\), when the diode is forward-biased? (\(V_{AB}\) in volt, \(i\) in ampere)
| 1. | \(V_{A B}=i\cdot5+0.6\) |
| 2. | \(V_{A B}=i\cdot5-0.6\) |
| 3. | \(V_{A B}=i\cdot5+(0.6-5)\) |
| 4. | \(V_{A B}=i\cdot5+\left(0.6+5\right)\) |
Subtopic: Â PN junction |
From NCERT
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Hints
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NEET 2023 - Target Batch - Aryan Raj Singh
- 1(current)
Q. No.
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