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Q. No.As the temperature increases, the electrical resistance:
1.
decreases for conductors but increases for semiconductors
2.
increases for both conductors and semiconductors
3.
decreases for both conductors and semiconductors
4.
increases for conductors but decreases for semiconductors
Subtopic: Energy Band theory |
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NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
Given below are two statements:
| Assertion (A): | Thickness of depletion layer is fixed in all semiconductor devices. |
| Reason (R): | No free-charge carriers are available in the depletion layer. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: PN junction |
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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 |
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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 |
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Specify which of the following type of material might satisfy these descriptions:
A half-filled valence band, an empty conduction band, and an energy gap of \(1\) eV.
A half-filled valence band, an empty conduction band, and an energy gap of \(1\) eV.
| 1. | conductor |
| 2. | insulator |
| 3. | semiconductor |
| 4. | none of the above |
Subtopic: Energy Band theory |
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To make ordinary silicon into a p-type semiconductor, you might add to it:
1. Indium
2. Antimony
3. Germanium
4. Carbon
1. Indium
2. Antimony
3. Germanium
4. Carbon
Subtopic: Types of Semiconductors |
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In a forward-biased \(\mathrm{p\text{-n}}\) junction diode, the potential barrier in the depletion region is of the form of:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: PN junction |
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The electrical circuit used to get smooth dc output from a rectifier circuit is called:
1. logic gate
2. amplifier
3. filter
4. oscillator
1. logic gate
2. amplifier
3. filter
4. oscillator
Subtopic: Rectifier |
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A full wave rectifier circuit along with the input and output voltages is shown in the figure. The contribution to the output voltage from diode-2 is:
1. A, C
2. B, D
3. B, C
4. A, D
1. A, C
2. B, D
3. B, C
4. A, D
Subtopic: Rectifier |
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What causes the depletion layer across the p-n junction?
| 1. | drift of holes |
| 2. | drift of electrons |
| 3. | diffusion of holes and electrons |
| 4. | diffusion of neither holes nor electrons |
Subtopic: PN junction |
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