Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

The normal operation of JFET is
A:
constant voltage region
B:
constant current region
C:
both constant voltage and constant current regions
D:
either constant voltage or constant current region
Answer: B

In major portion of drain characteristics ID is constant.

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The power dissipation in a transistor is the product of
A:
emitter current and emitter to base voltage
B:
emitter current and collector to emitter voltage
C:
collector current and collector to emitter voltage
D:
none of the above
Answer: C

Maximum power dissipation occurs at collector junction.

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Which of the following is true as regards photo emission?
A:
Velocity of emitted electrons is dependent on light intensity
B:
Rate of photo emission is inversely proportional to light intensity
C:
Maximum velocity of electron increases with decreasing wave length
D:
Both holes and electrons are produced
Answer: C

As wavelength decreases, frequency increases and maximum velocity of electron increases.

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A p-n junction diode has
A:
low forward and high reverse resistance
B:
a non-linear v-i characteristics
C:
zero forward current till the forward voltage reaches cut in value
D:
all of the above
Answer: D

A p-n Junction has all these features.

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In which region of a CE bipolar transistor is collector current almost constant?
A:
Saturation region
B:
Active region
C:
Breakdown region
D:
Both saturation and active region
Answer: B

It is used as amplifier when it operates in this region.

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