Q. No.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
One part of a device is connected to the negative terminal of a battery and the other part is connected to the positive terminal of a battery. If their ends are now altered, current does not flow in circuit. The device is:
1. \(\mathrm{p\text-n}\) Junction
2. Transistor
3. Zener diode
4. Triode
Zener diode is used for:
1. rectification.
2. stabilisation.
3. amplification.
4. producing oscillations in an oscillator.
© 2026 GoodEd Technologies Pvt. Ltd.