Basic Electronics (3110016) MCQs

MCQs of Field effect transistors (FET) and its biasing

Showing 1 to 10 out of 99 Questions
1 2 3 4 5 6
1.
A JFET
(a) Is a voltage controlled device
(b) Is a current controlled device
(c) Has a low input resistance
(d) Has a very large voltage gain
Answer:

Option (a)

2.
A unipolar transistor uses
(a) Both free electrons and holes
(b) Only free electrons
(c) Only holes
(d) Either one or the other, but not both
Answer:

Option (d)

3.
The input impedance of a JFET
(a) Approaches zero
(b) Approaches one
(c) Approaches infinity
(d) Is impossible to predict
Answer:

Option (c)

4.
The gate controls
(a) The width of the channel
(b) The drain current
(c) The gate voltage
(d) All of the above
Answer:

Option (d)

5.
The gate-source diode of a JFET should be
(a) Forward biased
(b) Reverse biased
(c) Either forward or reverse biased
(d) None of the above
Answer:

Option (b)

6.
Compared to a bipolar junction transistor, the JFET has a much higher
(a) Voltage gain
(b) Input resistance
(c) Supply voltage
(d) Current
Answer:

Option (b)

7.
The pinchoff voltage divided by
(a) Gate voltage
(b) Drain-source voltage
(c) Gate-source voltage
(d) Gate-source cutoff voltage
Answer:

Option (d)

8.
When the drain saturation current is less than IDSS, a JFET acts like a
(a) Bipolar junction transistor
(b) Current source
(c) Resistor
(d) Battery
Answer:

Option (c)

9.
RDS equals pinchoff voltage divided by
(a) Drain current
(b) Gate current
(c) Ideal drain current
(d) Drain current for zero gate voltage
Answer:

Option (d)

10.
The transconductance curve is
(a) Linear
(b) Similar to the graph of a resistor
(c) Nonlinear
(d) Like a single drain curve
Answer:

Option (c)

Showing 1 to 10 out of 99 Questions
1 2 3 4 5 6