Zener diode is used as:
1. Half-wave rectifier
2. Full-wave rectifier
3. A.C. voltage stabilizer
4. D.C. voltage stabilizer
The depletion layer has (for an unbiased \(p-n\) 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 d. c. 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 |
What is the correct statement regarding a p-n junction:
1. | high potential at the n side and low potential at the p side |
2. | high potential at the p side and low potential at the n side |
3. | p and n both are at the same potential |
4. | undetermined |
The given truth table is for which logic gate:
A | B | Y |
\(1\) | \(1\) | \(0\) |
\(0\) | \(1\) | \(1\) |
\(1\) | \(0\) | \(1\) |
\(0\) | \(0\) | \(1\) |
1. NAND
2. XOR
3. NOR
4. OR
For the given circuit of the P-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