Q. No.Which logic gate is represented by the following combination of logic gates?
1. OR
2. NAND
3. AND
4. NOR
1. OR
2. NAND
3. AND
4. NOR
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| 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. |
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| 1. | \(V_B\) increases, \(x\) decreases | 2. | \(V_B\) decreases, \(x\) increases |
| 3. | \(V_B\) increases, \(x\) increases | 4. | \(V_B\) decreases, \(x\) decreases |
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Which of the energy band diagrams shown in the figure corresponds to that of a semiconductor?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
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| 1. | \(5~\text A\) | 2. | \(0.2~\text A\) |
| 3. | \(0.6~\text A\) | 4. | zero |
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| 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. | \(2.0 \times 10^6 ~\text{V/m}\) |
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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. |
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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 |
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| 1. | Forward biasing | 2. | Reverse biasing |
| 3. | No biasing | 4. | All of these |
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