A. +4 V
B. -4 V
C. dependent on VGS
D. data insufficient
Related Mcqs:
- A certain D-MOSFET is biased at VGS = 0 V. Its data sheet specifies IDSS = 20mA and VGS(off) = -5 V. The value of the drain current is _____________?
A. 20 mA
B. 0 mA
C. 40 mA
D. 10 mA - The pinch-off voltage in a JFET is analogous to _____________ voltage in a vacuum tube?
A. anode
B. cathode
C. grid cut off
D. none of the above - In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ______________?
A. almost touch each other
B. have large gap
C. have moderate gap
D. none of the above - A certain p-channel E-MOSFET has VGS(th) = -2V. If VGS= 0V, the drain current is ____________?
A. 0 mA
B. ID(on)
C. maximum
D. IDSS - When drain voltage equals the pinch-off-voltage, then drain current ___________ with the increase in drain voltage?
A. decreases
B. increases
C. remains constant
D. none of the above - The pinch-off voltage of a JFET is about _______________?
A. 5 V
B. 0.6 V
C. 15 V
D. 25 V - In a certain common-source D-MOSFET amplifier, Vds =3.2 V r.m. and Vgs = 280 mV r.m.s. The voltage gain is_______________?
A. 1
B. 11.4
C. 8.75
D. 3.2 - A certain common-source JFET has a voltage gain of 10. If the source bypass capacitor is removed, ______________?
A. the voltage gain will increase
B. the transconductance will increase
C. the voltage gain will decrease
D. the Q-point will shift - In a certain CS JFET amplifier, RD= 1kO , RS= 560 O , VDD=10V and gm= 4500 µS. If the source resistor is completely bypassed, the voltage gain is ________________?
A. 450
B. 45
C. 2.52
D. 4.5 - 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
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