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Q. No.If an AND-gate and an OR-gate are OR-ed together, the resulting gate is:
1. AND
2. OR
3. XOR
4. none of the above
Subtopic: Logic gates |
From NCERT
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The system of gates shown in the adjacent diagram represents
1. AND gate
2. OR gate
3. XOR gate
4. null gate (always zero)
1. AND gate
2. OR gate
3. XOR gate
4. null gate (always zero)
Subtopic: Logic gates |
71%
From NCERT
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The input to a Zener diode circuit is an AC-voltage along with a DC: \(V_i=(20~\text V)\sin\omega t+(20~\text V)~\)
Current flows through the diode:
Current flows through the diode:
| 1. | continuously, in both directions |
| 2. | continuously, only in one direction |
| 3. | intermittently, in both directions |
| 4. | intermittently, only in one direction |
Subtopic: Applications of PN junction |
From NCERT
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The voltage across \(AB\) i.e., \(V_{AB}\) is varied from \(0\) V to \(12\) V. The current through branch \(XY~(i)\) is measured. Then:
| 1. | \(i=0.05\) A if \(V_{AB}\geq10\) V and \(i=\dfrac{V_{AB}}{200~\Omega}\) otherwise |
| 2. | \(i=0.05\) A if \(V_{AB}\leq10\) V and \(i=\dfrac{V_{AB}}{200~\Omega}\) otherwise |
| 3. | \(i=0.05\) A |
| 4. | \(i=\dfrac{V_{AB}}{200~\Omega}\) |
Subtopic: Applications of PN junction |
From NCERT
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Consider the circuit shown in the above diagram. The output \((Y)\) of the circuit does not depend on \(A.\) Then, \(Y=\)
1. \(B\) AND \(C\)
2. \(B\) OR \(C\)
3. \(B\)
4. \(C\)
1. \(B\) AND \(C\)
2. \(B\) OR \(C\)
3. \(B\)
4. \(C\)
Subtopic: Logic gates |
68%
From NCERT
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In the circuit shown in the figure, \(V_A>V_B.\) Which of the diodes conduct?
| 1. | only \(D_3\) | 2. | \(D_1\) and \(D_3\) |
| 3. | all of the diodes | 4. | none of the diodes |
Subtopic: PN junction |
53%
From NCERT
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The output \((Y)\) of the logic circuit given above is:
1. \(A\) AND \(C\)
2. \(A\) OR \(C\)
3. always TRUE
4. always FALSE
1. \(A\) AND \(C\)
2. \(A\) OR \(C\)
3. always TRUE
4. always FALSE
Subtopic: Logic gates |
59%
From NCERT
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The voltage drop across a silicon diode \((D)\) which is in forward bias and conducting a small current is approximately \(0.7\) V. Which of the following sources will deliver a voltage of \(3\) V?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: PN junction |
60%
From NCERT
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The output of the above circuit is:
| 1. | (\(A\) AND \(B\)) | 2. | (\(A\) OR \(B\)) |
| 3. | (\(B\) OR \(C\)) | 4. | none of the above |
Subtopic: Logic gates |
55%
From NCERT
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If the temperature of a diode rises, the current through the diode (keeping voltage constant):
| 1. | increases. |
| 2. | decreases. |
| 3. | remains constant. |
| 4. | may increase or decrease depending on bias. |
Subtopic: PN junction |
65%
From NCERT
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