Q. No.
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. |
The net charges on -type semiconductor and -type semiconductor are, respectively:
| 1. | Positive, negative | 2. | Negative, positive |
| 3. | Positive, positive | 4. | Zero, zero |
| 1. | Forward biasing | 2. | Reverse biasing |
| 3. | No biasing | 4. | All of these |
| 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 \(2~\text A\) |
If in a reverse-biased \(\mathrm{p\text-n}\) junction, an increase in carrier concentration takes place due to the creation of new hole-electron pairs by the light of wavelength less than or equal to \(620\) nm, then the bandgap is:
1. \(1\) eV
2. \(2\) eV
3. \(20\) eV
4. \(0.2\) eV
| 1. |  |
2. |  |
| 3. |  |
4. |  |
| 1. | It requires a low operational voltage. |
| 2. | It has a fast on-off switching capability. |
| 3. | The bandwidth of the emitted light is \(100\) A to \(10000\) A. |
| 4. | It does not require warm-up time. |
A combination of logic gates is shown in the circuit. If \(A\) is at \(0\) V and \(B\) is at \(5\) V, then the potential of \(R\) is:
| 1. | \(0\) V | 2. | \(5\) V |
| 3. | \(10\) V | 4. | Any of these |
How many minimum number of NOR gates are required to obtain an AND gate?
1. One
2. Two
3. Three
4. Five
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