At cut-off, the JFET channel is ___________

A at its widest point
B completely closed by the depletion region
C extremely narrow
D reverse baised

Correct Answer: completely closed by the depletion region

At cut off, the JFET channel is completely isolated by the depletion region. Gate connection is completely isolated from the main current carrying channel. At cut-off, VGS is sufficient to cause the JFET to act as an open circuit as the channel resistance is at maximum.
Bissoy MCQ
#Electronic Devices and Circuits #Transconductance Amplifiers

Related Questions

If the reverse bias on the gate of a JFET is increased, then width of the conducting channel ___________
A is decreased
B is increased
C remains the same
D none of the above
If the gate of a JFET is made less negative, the width of the conducting channel ___________
A remains the same
B is decreased
C is increased
D none of the above
In a p-channel JFET, the charge carriers are ___________
A electrons
B holes
C both electrons and holes
D none of the above
The channel of a JFET is between the ___________
A gate and drain
B drain and source
C gate and source
D input and output
The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is
A 0.3
B 0.9
C 0.03
D 0.66
The ratio of the depth of flow to the diameter of the channel for maximum discharge in a circular channel in open channel flow is
A 0.1
B 0.55
C 0.95
D 1.85
The gate voltage in a JFET at which drain current becomes zero is called ___________ voltage
A saturation
B pinch-off
C active
D cut-off
The output characteristics of a JFET closely resemble the output characteristics of a ___________ valve
A pentode
B tetrode
C triode
D diode
A JFET has high input impedance because ___________
A it is made of semiconductor material
B input is reverse biased
C of impurity atoms
D none of the above
A MOSFET differs from a JFET mainly because ___________
A of power rating
B the MOSFET has two gates
C the JFET has a pn junction
D none of the above

Next steps