Field Effect Transistors FET Mcqs - Set 1

1)   A common base configuration of a pnp transistor is analogous to _____________? of a JFET

a. common source configuration
b. common drain configuration
c. common gate configuration
d. none of the above
Answer  Explanation 

ANSWER: common gate configuration

Explanation:
No explanation is available for this question!


2)   In a JFET, IDSS is known as ________________?

a. drain to source current
b. drain to source current with gate shorted
c. drain to source current with gate open
d. none of the above
Answer  Explanation 

ANSWER: drain to source current with gate shorted

Explanation:
No explanation is available for this question!


3)   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
Answer  Explanation 

ANSWER: 4.5

Explanation:
No explanation is available for this question!


4)   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
Answer  Explanation 

ANSWER: 0 mA

Explanation:
No explanation is available for this question!


5)   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
Answer  Explanation 

ANSWER: 20 mA

Explanation:
No explanation is available for this question!


6)   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
Answer  Explanation 

ANSWER: completely closed by the depletion region

Explanation:
No explanation is available for this question!


7)   A certain JFET data sheet gives VGS(off) = -4 V. The pinch-off voltage Vp is _____________?

a. +4 V
b. -4 V
c. dependent on VGS
d. data insufficient
Answer  Explanation 

ANSWER: +4 V

Explanation:
No explanation is available for this question!


8)   The source terminal of a JEFT corresponds to _____________ of a vacuum tube?

a. plate
b. cathode
c. grid
d. none of the above
Answer  Explanation 

ANSWER: cathode

Explanation:
No explanation is available for this question!


9)   The channel of a JFET is between the ________________?

a. gate and drain
b. drain and source
c. gate and source
d. input and output
Answer  Explanation 

ANSWER: drain and source

Explanation:
No explanation is available for this question!


10)   The output characteristics of a JFET closely resemble the output characteristics of a ___________ valve?

a. pentode
b. tetrode
c. triode
d. diode
Answer  Explanation 

ANSWER: pentode

Explanation:
No explanation is available for this question!