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Semiconductor Electronics Quiz-2

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10 Questions

Popular Questions In Semiconductor Electronics Quiz-2

  • An a.c voltage of peak value 10 V is connected in series with a silicon diode a load resistance of 100Ω100\,\Omega. The forward resistance of the diode to 20Ω20\,\Omega. The peak output voltage across the load resistance will be:

  • The semiconductor used for fabrication of visible LEDs must at least have a band gap of

  • Intensity of light emitted by LED depends on

  • Colour of the light emitted by LED depends on

  • If x, y and z are lengths of the emitter, base, and collector of a transistor then:

  • In a junction transistor, the current gain in CB configuration is 0.99. If input resistance is 2kΩ2k\,\Omega and load connected to collector is 10kΩ10 k\,\Omega, then voltage gain in CE configuration will be:

  • In a transistor the current amplification ‘α\alpha’ is 0.9. The change in collector current when base current changes by 4 mA is

  • Is an n–p–n transistor 101210^{12} electrons enter emitter in 80 μs\mu s. The current gain α of transistor is 0.95. The number of electrons flowing in the base expressed as a percentage of electrons entering emitter is

  • The transfer ratio β\beta of a transistor is 50. The input resistance of the transistor when used in the common emitter configuration is 1kΩ1k \,\Omega. The value of collector current for a peak value of input a.c voltage of 0.01 is

  • A signal of 30 mV is applied to a common emitter transistor amplifier circuit. Due tothis the change in base current and the change in the collector current are 20μA20\,\mu A and 2 mA respectively. The load resistance is 15kΩ.15\,k\Omega.. The transconductance of the transistor is