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Q. No.A full wave rectifier circuit consists of two \(\mathrm{p\text-n}\) junction diodes, a centre-tapped transformer, capacitor and a load resistance. Which of these components remove the ac ripple from the rectified output?
| 1. | load resistance | 2. | a centre-tapped transformer |
| 3. | \(\mathrm{p\text-n}\) junction diodes | 4. | capacitor |
Subtopic: Rectifier |
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Given below are two statements:
| Statement I: | Photovoltaic devices can convert optical radiation into electricity. |
| Statement II: | Zener diode is designed to operate under reverse bias in the breakdown. |
| 1. | Statement I is False but Statement II is True. |
| 2. | Both Statement I and Statement II are True. |
| 3. | Both Statement I and Statement II are False. |
| 4. | Statement I is True but Statement II is False. |
Subtopic: Applications of PN junction |
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For the following logic gate, the truth table is:
| 1. |
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| 2. |
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| 3. |
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| 4. |
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Subtopic: Logic gates |
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A \(\mathrm{p} \text-\)type extrinsic semiconductor is obtained when Germanium is doped with:
| 1. | antimony | 2. | phosphorous |
| 3. | arsenic | 4. | boron |
Subtopic: Types of Semiconductors |
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In half-wave rectification, if the input frequency is \(60\) Hz, then the output frequency would be:
1. \(120\) Hz
2. zero
3. \(30\) Hz
4. \(60\) Hz
1. \(120\) Hz
2. zero
3. \(30\) Hz
4. \(60\) Hz
Subtopic: Rectifier |
64%
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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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In the given circuits (a), (b) and (c), the potential drop across the two \({\mathrm{p\text-n}}\) junctions are equal in:
| 1. | both circuits (a) and (c) |
| 2. | circuit (a) only |
| 3. | circuit (b) only |
| 4. | circuit (c) only |
Subtopic: PN junction |
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The truth table for the given logic circuit is:
| 1. |
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| 2. |
|
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| 3. |
|
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| 4. |
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Subtopic: Logic gates |
59%
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The output of the logic circuit shown is equivalent to a/an:
1. \(\mathrm{OR}\) gate
2. \(\mathrm{NOR}\) gate
3. \(\mathrm{AND}\) gate
4. \(\mathrm{NAND}\) gate
Subtopic: Logic gates |
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