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Q. No.Assuming that the diode is ideal, the output waveform for the circuit (shown in the figure) is:
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Subtopic: Rectifier |
From NCERT
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For a diode connected in parallel with a resistor, Choose the correct graph between \((I)\) and \((V)\) for the given circuit:
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Subtopic: PN junction |
From NCERT
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The breakdown in a reverse-biased p-n junction diode is more likely to occur due to:
| 1. | Large velocity of the minority charge carriers if the doping concentration is small. |
| 2. | Large velocity of the minority charge carriers if the doping concentration is large. |
| 3. | A strong electric field in a depletion region if the doping concentration is small. |
| 4. | Weak electric field in a depletion region if the doping concentration is small. |
Subtopic: PN junction |
From NCERT
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The peak voltage in the output of a half-wave rectifier is \(30 ~\text{V}.\) The RMS voltage of the output wave is: (assuming no distortion in wave)
| 1. | \(\dfrac{30}{\sqrt2}~\text{V}\) | 2. | \(15 ~\text{V}\) |
| 3. | \(\dfrac{15}{\sqrt2}~\text{V}\) | 4. | \(10 ~\text{V}\) |
Subtopic: Rectifier |
From NCERT
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The circuit shown in figure is given an input signal \(V_i,\) which varies with time and the corresponding output is \(V_o.\) Then,
| 1. | \(V_o=V_i+E\) |
| 2. | \(V_o=V_i-E\) |
| 3. | \(V_o=V_i,\) only when \(V_i>E\) |
| 4. | \(V_o=V_i,\) only when \(V_i<E\) |
Subtopic: PN junction |
From NCERT
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Which circuit element would make the best series filter to prevent high–frequency signals from passing through a bass speaker?
1. a capacitor
2. an inductor
3. a resistor
4. a transformer
1. a capacitor
2. an inductor
3. a resistor
4. a transformer
Subtopic: Rectifier |
From NCERT
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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
1. AND
2. OR
3. XOR
4. none of the above
Subtopic: Logic gates |
From NCERT
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Zener diodes with breakdown voltage ranging over \((2~\text{V}\text-200~\text{V})\) are commercially available. The breakdown voltage of a Zener diode:
| 1. | increases with increasing doping concentration. |
| 2. | decreases with increasing doping concentration. |
| 3. | does not depend on doping concentration. |
| 4. | may increase or decrease with increasing doping concentration. |
Subtopic: Applications of PN junction |
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 \(V_{AB}=20~\text{V}\) at its peak value, and is sinusoidal in time. The current \(i\) (in amperes), when plotted as a function of time, is given by:
(consider the diodes as ideal.)
(consider the diodes as ideal.)
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Subtopic: PN junction |
From NCERT
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