Question 1

What happens to the h parameters of a transistor when the operating point of the transistor changes?

Accepted Answer

A)  it also changes
B)  does not change
C)  may or may not change
D)  nothing happens A

Question 2

Process transconductance parameter is 40?A/V2. Find drain to source current in saturation.

Accepted Answer

A)  0.10 ma
B)  0.05ma
C)  - 0.05ma
D)  - 50a C

Question 3

Consider the following circuit. Process transconductance parameter = 0.50 mA/V2, W/L=1, Threshold voltage = 3V, VDD = 20V. Find the operating point of circuit.

Accepted Answer

A)  20v, 25ma
B)  13v, 22ma
C)  12.72v, 23.61ma
D)  20v, 23.61ma C

Question 4

Which of the following relation is true about gate current?

Accepted Answer

A)  ig=id+is
B)  id=ig
C)  is= ig
D)  ig=0

Question 5

Consider the following circuit. Given that VDD = 15V, VP = 2V, and IDS = 3mA, to bias the circuit properly, select the proper statement.

Accepted Answer

A)  rd 
B)  rd > 6k?
C)  rd > 4k?
D)  rd < 4k?

Question 6

Consider the circuit shown. VDS=3 V. If IDS=2mA, find VDD to bias circuit.

Accepted Answer

A)  -30v
B)  30v
C)  33v
D)  any value of voltage less than 12 v

Question 7

Consider the following circuit. IDSS = 2mA, VDD = 30V. Find R, given that VP = - 2V.

Accepted Answer

A)  10k?
B)  4k?
C)  2k?
D)  5k?

Question 8

Find the gate voltage for voltage divider having R1=R2=1K? and VDD=5V?

Accepted Answer

A)  1v
B)  5v
C)  3v
D)  2.5v

Question 9

Which of the following equation brings the relation between gate to source voltage and drain current in Self Bias?

Accepted Answer

A)  vgs=vdd
B)  vgs=-id rs
C)  vgs=0
D)  vgs=1+id rs

Question 10

To bias a e-MOSFET

Accepted Answer

A)  we can use either gate bias or a voltage divider bias circuit
B)  we can use either gate bias or a self bias circuit
C)  we can use either self bias or a voltage divider bias circuit
D)  we can use any type of bias circuit

Question 11

For a fixed bias circuit the drain current was 1mA, what is the value of source current?

Accepted Answer

A)  0ma
B)  1ma
C)  2ma
D)  3ma

Question 12

In CE arrangement, the value of input impedance is approximately equal to

Accepted Answer

A)  hie
B)  hib
C)  hoe
D)  hre

Question 13

For what type of signals does a transistor behaves as linear device?

Accepted Answer

A)  small signals only
B)  large signals only
C)  both large and small signal
D)  no signal

Question 14

How many h-parameters are there for a transistor?

Accepted Answer

A)  two
B)  three
C)  four
D)  five

Question 15

The dimensions of hie parameters are

Accepted Answer

A)  mho
B)  ohm
C)  farad
D)  ampere

Question 16

For a fixed bias circuit the drain current was 1mA, VDD=12V, determine drain resistance required if VDS=10V?

Accepted Answer

A)  1k?
B)  1.5k?
C)  2k?
D)  4k?

Question 17

If temperature changes, h parameters of a transistor

Accepted Answer

A)  also change
B)  does not change
C)  remains same
D)  may or may not change

Question 18

The h-parameters analysis gives correct results for

Accepted Answer

A)  large signals only
B)  small signals only
C)  both large and small
D)  not large nor small signals

Question 19

What is the current flowing through the R1 resistor for voltage divider (R1=R2=1K?, VDD=10V)?

Accepted Answer

A)  5ma
B)  3ma
C)  1ma
D)  2ma

Question 20

The hfe parameter is called----------------in CE arrangement with output short circuited.

Accepted Answer

A)  voltage gain
B)  current gain
C)  input impedance
D)  output impedance

Exam 3: Transistor Biasing and Circuit Analysis