Q. No.Which of the following gate is called the universal gate?
1. \(\mathrm{OR}\) gate
2. \(\mathrm{AND}\) gate
3. \(\mathrm{NAND}\) gate
4. \(\mathrm{NOT}\) gate
1. \(\mathrm{OR}\) gate
2. \(\mathrm{AND}\) gate
3. \(\mathrm{NAND}\) gate
4. \(\mathrm{NOT}\) gate
An intrinsic semiconductor is converted into an \(\mathrm{n\text{-}}\)type extrinsic semiconductor by doping it with:
1. phosphorous
2. aluminium
3. silver
4. germanium
To get output \(Y = 1\) in the given circuit which of the following input will be correct?
| \(A\) | \(B\) | \(C\) | |
| 1. | 1 | 0 | 1 |
| 2. | 1 | 1 | 0 |
| 3. | 0 | 1 | 0 |
| 4. | 1 | 0 | 0 |
A Zener diode, having a breakdown voltage equal to \(15~\text V,\) is used in a voltage regulator circuit as shown in the figure. The current through the diode is:
1. \(5~\text{mA}\)
2. \(10~\text{mA}\)
3. \(15~\text{mA}\)
4. \(20~\text{mA}\)
| (a) |  |
| (b) |  |
| (c) |  |
| (d) |  |
1. (a), (b) and (d)
2. (c) only
3. (a) and (c)
4. (b) and (d)
| 1. | \(p\)-type with electron concentration \(n_e=5\times10^9~\text{m}^{-3}\). |
| 2. | \(n\)-type with electron concentration \(n_e=5\times10^{22}~\text{m}^{-3}\). |
| 3. | \(p\)-type with electron concentration \(n_e=2.5\times10^{10}~\text{m}^{-3}\). |
| 4. | \(n\)-type with electron concentration \(n_e=2.5\times10^{23}~\text{m}^{-3}\). |
The following figure shows a logic gate circuit with two inputs \(A\) and \(B\), and the output \(Y\). The voltage waveforms of \(A,B\) and \(Y\) are as given.
The logic gate is:
| 1. | OR gate | 2. | AND gate |
| 3. | NAND gate | 4. | NOR gate |
The following table is for which logic gate?
| Input | Output | |
| A | B | C |
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
1. AND
2. OR
3. NAND
4. NOT
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