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In a \(\mathrm{p\text-n}\) junction diode not connected to any circuit:
1.
the potential is the same everywhere.
2.
the \(\mathrm{p}\text-\)type is at higher potential than the \(\mathrm{n}\text-\)type side.
3.
there is an electric field at the junction directed from the \(\mathrm{n}\text-\)type side to the \(\mathrm{p}\text-\)type side.
4.
there is an electric field at the junction directed from the \(\mathrm{p}\text-\)type side to the \(\mathrm{n}\text-\)type side.
Subtopic: PN junction |
61%
Level 2: 60%+
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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%
Level 2: 60%+
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Which of the energy band diagrams shown in the figure corresponds to that of a semiconductor?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Energy Band theory |
55%
Level 3: 35%-60%
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Which logic gate is represented by the following combination of logic gates?
1. OR
2. NAND
3. AND
4. NOR
Subtopic: Logic gates |
72%
Level 2: 60%+
NEET - 2015
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The current through an ideal \(\mathrm{p\text-n}\) junction diode shown in the circuit will be:
| 1. | \(5~\text A\) | 2. | \(0.2~\text A\) |
| 3. | \(0.6~\text A\) | 4. | zero |
Subtopic: PN junction |
67%
Level 2: 60%+
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A potential barrier of \(0.50~\text V\) exists across a \(\mathrm{p\text-n}\) junction. If the depletion region is \(5.0\times10^{-7}~\text{m}\) wide, the intensity of the electric field in this region is:
| 1. | \(1.0 \times 10^6 ~\text{V/m}\) | 2. | \(1.0 \times 10^5 ~\text{V/m}\) |
| 3. | \(2.0 \times 10^5 ~\text{V/m}\) | 4. | \(2.0 \times 10^6 ~\text{V/m}\) |
Subtopic: PN junction |
84%
Level 1: 80%+
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Subtopic: Logic gates |
76%
Level 2: 60%+
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A Zener diode is shown in the following circuit diagram. When the source voltage fluctuates such that \(V>V_z\) then:
| 1. | all the current \(I_1, I_2~\text{and}~I_3\) change. |
| 2. | only \(I_1\) and \(I_2\) change and \(I_3\) remains constant. |
| 3. | only \(I_1\) and \(I_3\) change and \(I_2\) remains constant. |
| 4. | all the currents remain constant. |
Subtopic: Applications of PN junction |
71%
Level 2: 60%+
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The net charges on -type semiconductor and -type semiconductor are, respectively:
| 1. | Positive, negative | 2. | Negative, positive |
| 3. | Positive, positive | 4. | Zero, zero |
Subtopic: Types of Semiconductors |
72%
Level 2: 60%+
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In which of the following condition, diffusion current in \(\mathrm{p\text-n}\) junction is more than drift current?
| 1. | Forward biasing | 2. | Reverse biasing |
| 3. | No biasing | 4. | All of these |
Subtopic: PN junction |
74%
Level 2: 60%+
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