FET Quiz

1. As compared to N-channel MOS switch, the P-channel MOS switch has

A. equal ON resistance
B. less ON resistance
C. more ON resistance
D. either 'a' or 'b'

Click for answer 

C. more ON resistance

2. P-channel MOSFET is basically a following device

A. current operated
B. voltage operated
C. power operated
D. low-frequency operated

Click for answer 

D. low-frequency operated

3. In a JFET, drain current is maximum when V_GS is

A. zero
B. negative
C. positive
D. equal to V_p

Click for answer 

A. zero

4. When a reverse bias is applied to Gate of JFET the depletion region width

A. is wider near drain and tapers near source
B. is wider near the source and tapers near drain
C. is uniform in the channel
D. is nil

Click for answer 

A. is wider near drain and tapers near source

5. In a MOSFET, the polarity of the inversion layer is the same as that of the

A. charge on the gate electrode
B. majority carriers in the substrate
C. majority carriers in the source
D. minority carriers in the drain

Click for answer 

C. majority carriers in the source

6. The channel ___________________ when I_D=I_DSS

A. is widest
B. is closed
C. is narrowest
D. does not exist

Click for answer 

A. is widest

7. For proper operation of an N-channel JFET the gate voltage needs to be _____ with respect to the drain.

A. positive
B. negative
C. zero
D. either 'A' or 'B'

Click for answer 

B. negative

8. The p-channel JFET used in Digital technology as

A. amplifier
B. rectifier
C. invertor
D. switch

Click for answer 

D. switch

9. After V_DS reaches pinch-off value V_p in a JFET, drain current I_D becomes

A. zero
B. low
C. reversed
D. saturated

Click for answer 

D. saturated

10. For a JFET, when V_GS is increased beyond the pinch-off voltage, the drain current

A. increases
B. decreases
C. remains constant
D. first decreases and then increases

Click for answer 

C. remains constant