BASIC ELECTRONICS
Field Effect Transistor (FET) Quiz
1. In N-channel JFET the I
D
is controlled by
A. I
D
B. V
DS
C. V
GS
D. I
G
Click for answer
C. V
GS
2. A field-effect transistor (FET) operates on ___________.
A. Negatively charged ions only
B. Positively charged ions only
C. Minority carriers only
D. Majority carriers only
Click for answer
D. Majority carriers only
3. In common source configuration the input resistance of a JFET will be approximately
A. 10
15
Ohm
B. 500 Ohm
C. 100 Kilo-ohm
D. 3 Mega Ohm
Click for answer
D. 3 Mega Ohm
4. A source follower (using an FET) usually has a voltage gain which is
A. >+100
B. slightly less than unity, but positive
C. exactly unity, but negative
D. about -10
Click for answer
B. slightly less than unity, but positive
5. The N-channel EMOSFET has high input _____________.
A. Resistance and Capacitance
B. Inductance and Resistance
C. Current Intake
D. Capacitance and Inductance
Click for answer
D. Capacitance and Inductance
6. A FET consists of a
A. source
B. drain
C. gate
D. all of the above
Click for answer
D. all of the above
7. For FET, the level of V
GS
that results in I
D
= 0 mA is defined by V
GS
= ____________ .
A. V
GS(off)
B. V
P
C. V
DS
D. none of the above
Click for answer
B. V
P
8. What is the range of an FET's input impedance ?
A. 1 kilo ohms to 10 kilo ohms
B. 100 ohms to 1000 ohms
C. 50 kilo ohms to 100 kilo ohms
D. 1 Mega ohms to several hundred Mega ohms
Click for answer
D. 1 Mega ohms to several hundred Mega ohms
9. The JFET is always operated with gate-source p-n junction ________________.
A. no bias
B. forward-biased
C. reverse-biased
D. grounded
Click for answer
C. reverse-biased
10. FETs have similar properties to
A. PNP transistors
B. NPN transistors
C. uni-junction transistors
D. Scotty diodes
Click for answer
B. NPN transistors
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