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 \(10\) V. The DC component of the output voltage is:
1. \(\frac{10}{\pi }\) V
2. \(10\) V
3. \(\frac{20}{\pi }\) V
4. \(\frac{10}{\sqrt{2}}\) 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 |
\(1\) | \(1\) | \(0\) |
\(0\) | \(1\) | \(1\) |
\(1\) | \(0\) | \(1\) |
\(0\) | \(0\) | \(1\) |
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
The current \((I)\) in the circuit will be:
1. | \(\dfrac{5}{40}~\text{A}\) | 2. | \(\dfrac{5}{50}~\text{A}\) |
3. | \(\dfrac{5}{10}~\text{A} \) | 4. | \(\dfrac{5}{20}~\text{A}\) |