Of the diodes shown in the following diagrams, which one of the diodes is reverse biased?
1. | 2. | ||
3. | 4. |
The truth table for the following network is:
1. |
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2. |
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3. |
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4. | None of the above |
Zener diode is used as:
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 \(10\) 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 |
\(1\) | \(1\) | \(0\) |
\(0\) | \(1\) | \(1\) |
\(1\) | \(0\) | \(1\) |
\(0\) | \(0\) | \(1\) |