Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

Introducing a resistor in the emitter of a common amplifier stabilizes the d.c. operating point against variations in
A:
only the temperature
B:
only ÎČ of the transistor
C:
both temperature and ÎČ
D:
none of these
Answer: C
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An inductor filter has a ripple that __________ with load resistance and consequently is used only with relatively __________ load currents.
A:
decreases, low
B:
decreases, high
C:
increases, low
D:
increases, high
Answer: D
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For BJT, under saturation condition
A:
IC = ÎČIB
B:
IC > bIB
C:
IC is independent of all other parameters
D:
IC < ÎČIB
Answer: B
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A long specimen of P type semiconductor material
A:
is + vely charged
B:
is electrically neutral
C:
has an electric field directed along its length
D:
acts as a dipole
Answer: B
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EG for silicon is 1.12 eV and that for germanium is 0.72 eV. Therefore it can be concluded that
A:
more number of electron-hole pairs will be generated in silicon than in germanium at room temperature
B:
less number of electron hole pairs will be generated in silicon than in germanium at room temperature
C:
equal number of electron-hole pairs will be generated in both at lower temperatures
D:
equal number of electron-hole pairs will be generated in both at higher temperatures
Answer: B
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