Q. No.
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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:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: PN junction |
Level 4: Below 35%
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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 |
Level 3: 35%-60%
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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 |
Level 3: 35%-60%
Hints
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.)
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: PN junction |
Level 3: 35%-60%
Hints
The \(\mathrm{n} \text-\)side of the depletion layer of a \(\mathrm{p\text-n}\) junction:
| 1. | always has the same width as the \(\mathrm{p} \text-\)side |
| 2. | has no bound charges |
| 3. | is negatively charged |
| 4. | is positively charged |
Subtopic: PN junction |
Level 3: 35%-60%
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A voltage \(V_{AB}\) is applied to the left side input and the potential differences \(V_{AX}\) and \(V_{XY}\) are measured. Assume the diodes are ideal i.e., there is no potential difference across the diodes in forward bias. Which of the following is true?
1. \(\text{If}~V_{AB}>0, V_{AX}>0\)
2. \(\text{If}~V_{AB}>0, V_{XY}>0\)
3. \(\text{If}~V_{AB}<0, V_{XY}>0\)
4. \(\text{If}~V_{AB}<0, V_{AX}>0\)
1. \(\text{If}~V_{AB}>0, V_{AX}>0\)
2. \(\text{If}~V_{AB}>0, V_{XY}>0\)
3. \(\text{If}~V_{AB}<0, V_{XY}>0\)
4. \(\text{If}~V_{AB}<0, V_{AX}>0\)
Subtopic: PN junction |
Level 3: 35%-60%
Hints
What will be the change in the current through the \(5~\text V\) cell if the diode \(D\) is reversed?
1. No change
2. Increases by \(0.2~\text A\)
3. Increases by \(0.3~\text A\)
4. Decreases by \(0.2~\text A \)
1. No change
2. Increases by \(0.2~\text A\)
3. Increases by \(0.3~\text A\)
4. Decreases by \(0.2~\text A \)
Subtopic: PN junction |
Level 3: 35%-60%
Hints
In the circuit shown in the diagram given below, \(R\) is a small resistor, \(V_i\) is the input voltage between \(A\) & \(B\) while \(V_o\) is the output voltage between \(C\) & \(D\).
Consider the following two statements and mark the correct option.
Consider the following two statements and mark the correct option.
| (I) | \(\text{If}~V_i>2~\text{V}, ~\text{then}~V_o = V_i\) |
| (II) | \(\text{If}~V_i<2~\text{V}, ~\text{then}~V_o = 2~\text{V}\) |
| 1. | (I) is True. |
| 2. | (II) is True. |
| 3. | (I) and (II) are both True. |
| 4. | (I) and (II) are both False. |
Subtopic: PN junction |
Level 3: 35%-60%
Hints
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%
Level 3: 35%-60%
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In a \(\mathrm{p\text-n}\) junction, the potential barrier is due to the charges on either side of the junction, these charges are:
| 1. | majority carriers |
| 2. | minority carriers |
| 3. | fixed donor and acceptor ions |
| 4. | both (1) and (2) |
Subtopic: PN junction |
55%
Level 3: 35%-60%
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