The normal operation of JFET is
constant voltage region
constant current region
both constant voltage and constant current regions
either constant voltage or constant current region
Correct answer is B
In major portion of drain characteristics, ID is constant.
The power dissipation in a transistor is the product of
emitter current and emitter to base voltage
emitter current and collector to emitter voltage
collector current and collector to emitter voltage
none of the above
Correct answer is C
Maximum power dissipation occurs at collector junction.
Which of the following is true as regards photo emission?
Velocity of emitted electrons is dependent on light intensity
Rate of photo emission is inversely proportional to light intensity
Maximum velocity of electron increases with decreasing wave length
Both holes and electrons are produced
Correct answer is C
As wavelength decreases, frequency increases and maximum velocity of electron increases.
In which region of a CE bipolar transistor is collector current almost constant?
Saturation region
Active region
Breakdown region
Both saturation and active region
Correct answer is B
It is used as amplifier when it operates in this region.
The word enhancement mode is associated with
tunnel diode
MOSFET
JFET
photo diode
Correct answer is B
MOSFET may be depletion mode or enhancement mode.
Work function of oxide coated cathode is much lower than that of tungsten cathode.
True
False
Cannot say
None of the above
Correct answer is A
Therefore emission current from oxide coated cathode is more.
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