Q. No.
Zener diode is used as:
1. Half-wave rectifier
2. Full-wave rectifier
3. AC voltage stabilizer
4. DC voltage stabilizer
1. Half-wave rectifier
2. Full-wave rectifier
3. AC voltage stabilizer
4. DC voltage stabilizer
The depletion layer has (for an unbiased \(\mathrm{p\text-n}\) junction):
1. electrons
2. holes
3. static ions
4. neutral atoms
In semiconductors at room temperature:
| 1. | The valence band is completely filled and the conduction band is partially filled. |
| 2. | The valence band is completely filled. |
| 3. | The conduction band is completely empty. |
| 4. | The valence band is partially empty and the conduction band is partially filled. |
The peak voltage in the output of a half-wave diode rectifier fed with a sinusoidal signal without a filter is \(10~\text V.\) The DC component of the output voltage is:
1. \(\dfrac{10}{\pi }~\text V\)
2. \(10~\text V\)
3. \(\dfrac{20}{\pi }~\text V\)
4. \(\dfrac{10}{\sqrt{2}}~\text V\)
In a p–n junction photocell, the value of the photo electromotive force produced by monochromatic light is proportional to:
| 1. | the intensity of the light falling on the cell. |
| 2. | the frequency of the light falling on the cell. |
| 3. | the voltage applied at the p–n junction. |
| 4. | the barrier voltage at the p–n junction. |
The output of the OR gate is \(1\):
| 1. | if either or both inputs are \(1.\) |
| 2. | only if both inputs are \(1.\) |
| 3. | if either input is zero |
| 4. | if both inputs are zero |
| 1. | High potential at the \(\mathrm{n}\) side and low potential at the \(\mathrm{p}\) side. |
| 2. | High potential at the \(\mathrm{p}\) side and low potential at the \(\mathrm{n}\) side. |
| 3. | \(\mathrm{p}\) and \(\mathrm{n}\) both are at the same potential. |
| 4. | Undetermined. |
| A | B | Y |
| \(1\) | \(1\) | \(0\) |
| \(0\) | \(1\) | \(1\) |
| \(1\) | \(0\) | \(1\) |
| \(0\) | \(0\) | \(1\) |
2. XOR
3. NOR
4. OR
For the given circuit of the \(\mathrm{p\text-n}\) 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 \(2V.\) |
The following truth table represent which logic gate:
| A | B | C |
| 1 | 1 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 0 | 0 | 1 |
1. XOR
2. NOT
3. NAND
4. AND
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