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Iscet Semiconductors

Total questions: 60

Worksheet time: 15hrs 0mins

Name
Class
Date
1.

Identify this circuit:

a)

Hartley Oscillator

b)

Colpits Oscillator

c)

Crystal Oscillator

2.

What condition is required for a circuit to oscillate?

a)

Damped Wave

b)

Negative gain

c)

Positive Feedback

d)

high Q inductor

3.

Identify this Circuit:

a)

Class C Amplifier

b)

Hartley Oscillator

c)

Class A RF Amplifier

d)

High gain RF Amplifier

4.

Identify this Circuit

a)

Class C Amplifier

b)

Colpits Oscillator

c)

Class A RF Amplifier

d)

Crystal Oscillator

5.

What device is considered unipolar?

a)

Transistor

b)

E-Mosfet

c)

Triac

d)

Jfet

6.

JFETs operate in what mode?

a)

Enhancement Mode

b)

Current Mode

c)

Depletion Mode

7.

JFET Bias voltage is required to :

a)

limit the Channel Current

b)

Increase the gate current

c)

Increase the channel current

d)

turn on the device

8.

JFET bias is defined as:

a)

Vgs

b)

Idss

c)

Vsd

d)

Vdd

9.

JFET Vgs is always:

a)

Foward bias

b)

Reverse Bias

c)

Required to increase Drain Current

d)

Create the Channel

10.

JFET Forward Biased Vgs will :

a)

Increase the Drain to Source Current

b)

Destroy the device

c)

Create the channel

d)

Turn off the Ids

11.

Idss denotes what condition:

a)

drain to source current = 0

b)

Drain to source current is Maximum

c)

Source current is limited

d)

Source is Self-Biased

12.

What condition is required for JFET Idss?

a)

Source Resister

b)

Vgs = 0

c)

Vgs is forward Biased

d)

-V applied to gate

13.

To Self Bias a JFET, Vgs is developed:

a)

Across the drain Load

b)

Across the source Resister

c)

Across Vds

14.

Identify this device:

a)

P-channel Jfet

b)

P-channel mosfet

c)

N-channel Mosfet

d)

N-channel Jfet

15.

Gain of a FET is specified as:

a)

Beta

b)

Alpha

c)

Transconductance

16.

Which FET has no physical channel?

a)

E-Mosfet

b)

D-Mosfet

c)

Jfet

17.

What type of Fet will operate is both Depletion and Enhancement Mode?

a)

D-mosfet

b)

E-mosfet

c)

Jfet

18.

Another term to indicate a Mosfet:

a)

Depletion mode device

b)

Enhancement mode device

c)

Insulated Gate Fet (IgFet)

d)

Trans-conductance device

19.

Identify this device:

a)

P-Channel E-Mosfet

b)

N-channel E-Mosfet

c)

N-channel D-Mosfet

d)

P-channel D-Mosfet

20.

Identify the P-channel E-Mosfet:

a)
b)
c)
d)
21.

Identify the N-channel D-Mosfet:

a)
b)
c)
d)
22.

Vs = 12V Vr= ?

a)

12V

b)

0V

c)

11.4V

d)

.6V

23.

Vs = 12V Vd=

a)

0V

b)

12V

c)

11.4V

d)

.6V

24.

V1= 12V Vr1 =?

a)

12V

b)

0V

c)

11.4V

d)

.6V

25.

V1 = 12V Vd1 = ?

a)

12V

b)

0V

c)

11.4V

d)

.6V

26.

Vi = 12V Vzd1=5V Izd1= 10ma RL=1K Ri = ?

a)

1.2K

b)

466 Ohms

c)

810 Ohms

d)

323 Ohms

27.

Identify this devise:

a)

FET

b)

SCR

c)

Triac

d)

Dual Diode

28.

A current that is present in a reversed biased diode is called:

a)

Eddy Current

b)

Transient current

c)

Leakage current

d)

Back current

29.

PIV is a specification for a Diode that indicates:

a)

Maximum Forward Current

b)

Maximum Reverse Current

c)

Maximum Forward Voltage

d)

Maximum Reverse Bias voltage

30.

Identify this device

a)

Tunnel Diode

b)

Zener Diode

c)

Schottkey Diode

d)

Scr

31.

Identify this Circuit

a)

Common Emitter

b)

Common Collector

c)

Common Base

32.

To properly bias this transistor the :

a)

Base is more Negative than the Emitter, Collector is more negative than the Base

b)

Collector is more positive than the Base. Emitter is more positive than the Base

c)

Emitter is more negative than the base, Collector is more positive than the Base

33.

What formula is used to determine the Base current?

a)

Ib = Ic/Beta

b)

Ib = Beta/Ic

c)

Ib = Rc/Rb

d)

Ib = IRc

34.

Identify this transistor configuration:

a)

Common Emitter

b)

Common Collector

c)

Common Base

35.

Identify this Transistor Configuration:

a)

Common Collector

b)

Common Base

c)

Common Emitter

36.

What is the Voltage Gain of this Circuit?

a)

 Av=10Av=10  

b)

 Av≈1Av\approx1  

c)

 Av>1Av>1  

d)

 Av=RbReAv=\frac{Rb}{Re}  

37.

The term to describe this circuit:

a)

Common Emitter Switch

b)

Class C Amplifier

c)

Emitter Follower

d)

Class A Amplifier

38.

What transistor configuration has low output Impedance?

a)

Common Base

b)

Common Collector

c)

Common emitter

39.

What transistor configuration has low input impedance?

a)

Common Emitter

b)

Common Base

c)

Common Collector

40.

Which Amplifier class operates for 360 degrees of sine?

a)

Class A

b)

Class B

c)

Class C

d)

Class D

41.

A Class A amplifier is bias at what point on the load line?

a)

Below Cut-off

b)

At Cut-off

c)

At Mid point

d)

At Ic saturation

42.

What is the Phase relationship of Vin and Vout?

a)

180 degrees out of phase

b)

90 degrees out of phase

c)

Vin is in Phase with Vout

43.

What component is responsible for thermal stability of the Amplifier?

a)

RL

b)

C2 Emitter Bypass

c)

RE

d)

C1 Coupling Capacitor

44.

This Amplifier's output is signal amplitude is lower than expected. All DC bias voltage are correct. What is the cause?

a)

C1 coupling Capacitor

b)

RE Emitter Resister

c)

C2 emitter bypass

d)

R1 base Bias

45.

Identify this circuit:

a)

Class A Amplifier

b)

Class B Amplifier

c)

Class C amplifier

d)

Emitter Follower

46.

At what point on the load line is this Amplifier Biased?

a)

At Cut-off

b)

Below Cut-off

c)

Mid point

d)

Below saturation

47.

Calculate the DC voltage at the Base of this Amplifier

a)

3.12V

b)

1.23V

c)

2.83V

d)

.6 V

48.

Identify This Bias arrangement:

a)

Base Bias

b)

Voltage divider Bias

c)

Collector Bias

d)

Collector Feedback Bias

49.

No signal at the base of Q2. Q1 is operating. All DC Bias is Correct. What is the Cause?

a)

C2 Open

b)

C1 Open

c)

C2 Shorted

d)

C3 Open

50.

What is the Voltage on the collector?

a)

30V

b)

15V

c)

1.5V

d)

0V

51.

What is the Voltage on the Emitter?

a)

2.83V

b)

1.2V

c)

2.23V

d)

.6V

52.

The output of this Amplifier is only the positive alternation. What is the cause?

a)

NPN transistor bad

b)

PNP transistor bad

c)

Bias Diodes Open

d)

Coupling Capacitor Open

53.

What is the DC Voltage at the Emitter Junction?

a)

Vcc

b)

.6V

c)

1.2V

d)

1/2 Vcc

54.

Calculate the AV of this circuit:

a)

10

b)

2

c)

5

d)

6

55.

A sine wave is input to this Amplifier. What is the output?

a)

DC

b)

Sine with no Gain

c)

Triangle Wave

d)

Square Wave

56.

Calculate the Output of this Amplifier:

a)

16.2 mV

b)

-16.2 mV

c)

139.23 mV

d)

-169.34 mV

57.

Vref = +5V DC Vin = +1V DC Vout =

a)

+Vcc

b)

-Vcc

c)

Square Wave

d)

0V

58.

Identify this circuit:

a)

Inverting Amp

b)

Voltage follower

c)

Zero Level Detector

59.

What is the Voltage Gain of this circuit?

a)

AV = 1

b)

Av = -1

c)

AV = 0

d)

AV = 10

60.

Va = 2V Vb = 1.5V Vout =

a)

+2.27V

b)

+4.45V

c)

-2.27V

d)

-4.45V

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