Electronic Devices and Circuits - Section 1 (2)
Electronic Devices and Circuits - Section 1
| 9. | A periodic voltage has following value for equal time intervals changing suddenly from one value to next... 0, 5, 10, 20, 50, 60, 50, 20, 10, 5, 0, -5, -10 etc. Then rms value of the waveform is
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| 10. |
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Answer: Option A Explanation: |
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= 42.53| 11. | Assertion (A): The reverse saturation current in a semiconductor diode is 4nA at 20°C and 32 nA at 50°C. Reason (R): The reverse saturation current in a semiconductor diode doubles for every 10°C rise in temperature. |
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Answer: Option A Explanation: At 20°C, 4 nA, at 30°C, 8 nA, at 40°C, 16 nA, at 50°C, 32 nA. |
| 12. | A potential of 7 V is applied to a silicon diode. A resistance of 1 K ohm is also in series with the diode. The current is |
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| 13. | The types of carriers in a semiconductor are |
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Answer: Option B Explanation: Holes and electrons. |
| 14. | In a degenerate n type semiconductor material, the Fermi level, |
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Answer: Option B Explanation: This is due to high level of doping. |
| 15. | Secondary emission is always decremental. |
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Answer: Option B Explanation: Sometimes it can be useful also. |
| 16. | The v-i characteristics of a FET is shown in figure. In which region is the device biased for small signal amplification |
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Answer: Option B Explanation: Small signal amplifier operation is in constant current region of characteristics. |
