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Q. No.Identify the logic operation performed by the given circuit:
1. AND gate
2. OR gate
3. NOR gate
4. NAND gate
Subtopic: Logic gates |
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In an experiment of \(\text{CE}\) configuration of an \(\text{n-p-n}\) transistor, the transfer characteristics observed are given in the figure.
If the input resistance is \(200\) \(\Omega\) and output resistance is \(60\) \(\Omega\), the voltage gain in this experiment will be:
1. \(10\)
2. \(15\)
3. \(20\)
4. \(25\)
If the input resistance is \(200\) \(\Omega\) and output resistance is \(60\) \(\Omega\), the voltage gain in this experiment will be:
1. \(10\)
2. \(15\)
3. \(20\)
4. \(25\)
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The \((\text{I-V})\) characteristics of a \(\text{p-n}\) junction diode in forward bias are shown in the figure. The ratio of dynamic resistance, corresponding to forward bias voltages of \(2\) V and \(4\) V respectively, is:
1. \(1:2\)
2. \(5:1\)
3. \(1:40\)
4. \(20:1\)
1. \(1:2\)
2. \(5:1\)
3. \(1:40\)
4. \(20:1\)
Subtopic: PN junction |
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As per the given circuit, the value of current through the battery will be:
1. \(4~\text{A}\)
2. \(3~\text{A}\)
3. \(2~\text{A}\)
1. \(1~\text{A}\)
1. \(4~\text{A}\)
2. \(3~\text{A}\)
3. \(2~\text{A}\)
1. \(1~\text{A}\)
Subtopic: PN junction |
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The positive feedback is required by an amplifier to act as an oscillator. The feedback here means:
| 1. | external input is necessary to sustain ac signal in the output. |
| 2. | a portion of the output power is returned back to the input. |
| 3. | feedback can be achieved by the LR network. |
| 4. | the base-collector junction must be forward-biased. |
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Identify the correct Logic Gate for the following output (Y) of two inputs A and B.
| 1. |  |
| 2. |  |
| 3. |  |
| 4. | none of these |
Subtopic: Logic gates |
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For a transistor to act as a switch, it must be operated in
1. Active region
2. Saturation state only
3. Cut-off state only
4. Saturation and cut-off state
1. Active region
2. Saturation state only
3. Cut-off state only
4. Saturation and cut-off state
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The cut-off voltage of the diodes (shown in the figure) in forward bias is \(0.6~\text{V}\). The current through the resister of \(40~ \Omega\) is:
1. \(2~\text{mA}\)
2. \(4~\text{mA}\)
3. \(6~\text{mA}\)
4. \(8~\text{mA}\)
1. \(2~\text{mA}\)
2. \(4~\text{mA}\)
3. \(6~\text{mA}\)
4. \(8~\text{mA}\)
Subtopic: PN junction |
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In the following circuit, the correct relation between output (Y) and inputs A and B will be:
1. \(Y=A B \)
2. \(Y=A+B \)
3. \(Y=\overline{\mathrm{AB}} \)
4. \(Y=\overline{A+B}\)
1. \(Y=A B \)
2. \(Y=A+B \)
3. \(Y=\overline{\mathrm{AB}} \)
4. \(Y=\overline{A+B}\)
Subtopic: Logic gates |
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For using a multimeter to identify diodes from electrical components, choose the correct statement out of the following about the diode:
1. It is a two-terminal device which conducts current in both directions.
2. It is a two-terminal device which conducts current in one direction only.
3. It does not conduct current and gives an initial deflection which decays to zero.
4. It is a three-terminal device which conducts current in one direction only between the central terminal and either of the remaining two terminals.
1. It is a two-terminal device which conducts current in both directions.
2. It is a two-terminal device which conducts current in one direction only.
3. It does not conduct current and gives an initial deflection which decays to zero.
4. It is a three-terminal device which conducts current in one direction only between the central terminal and either of the remaining two terminals.
Subtopic: PN junction |
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