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WorksheetsUNIT-2_FET_Quiz_EDC
Total questions: 20
Worksheet time: 20mins
FET acts as constant current source in
Ohmic region
Breakdown region
Pinch off region
Both (b) and (c)
In a JFET, IDSS is known as …………..
drain to source current
drain to source current with gate shorted
drain to source current with gate open
none of the above
For an n-channel FET, What is the direction of current flow?
Source to drain
drain to source
Gate to source
Gate to drain
At cut-off, the JFET channel is ……….
at its widest point
completely closed by the depletion region
extremely narrow
reverse biased
In a p-channel JFET, the charge carriers are …………..
holes
electrons
both electrons and holes
none of the above
The input control parameter of a JFET is ……………
source voltage
drain voltage
gate voltage
gate current
The transconductance of FET depends upon
Drain supply
The type of FET
Gate current
Gate to Source voltage
A JFET has three terminals, namely …………
cathode, anode, grid
emitter, base, collector
source, gate, drain
none of the above
The voltage gain of cascade amplifier using FET is
Product of two voltage gains
Equal to C.D amplifier
Almost equal to C.S amplifier
None of the above
A JFET is also called …………… transistor
unipolar
bipolar
unijunction
none of the above
The input impedance of a JFET is …………. that of an ordinary transistor
equal to
less than
more than
none of the above
If the reverse bias on the gate of a JFET is increased, then width of the conducting channel …………..
is decreased
is increased
remains the same
none of the above
A FET is a...........controlled device whereas a bipolar transistor is a............controlled device.
Current, voltage
Drain, gate
Gate, drain
Voltage, current
In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ………
almost touch each other
have large gap
have moderate gap
none of the above
A certain common-source JFET has a voltage gain of 10. If the source bypass capacitor is removed, ……………….
the voltage gain will increase
the transconductance will increase
the voltage gain will decrease
the Q-point will shift
What is the value of drain current when Vgs=pinch off voltage?
0A
1A
2A
Cannot be determined
The gate voltage in a JFET at which drain current becomes zero is called ……….. voltage
saturation
pinch-off
active
cut-off
Which of the following statement is true about FET?
It has high output impedance
It has high input impedance
It has low input impedance
It does not offer any resistance
The gate of a JFET is ………… biased
reverse
forward
reverse as well as forward
none of the above
In a common-source JFET amplifier, the output voltage is …………………
180° out of phase with the input
in phase with the input
90° out of phase with the input
taken at the source
