Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Electronics > Electronics Final > Flashcards

Electronics Final Flashcards

1
Q

How many layers are in a BJT ?

A

3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When testing a Good triac between MT2 and MT1 and gate disconnected, should read ?

A

OL both directions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Does the arrow in a PNP point positive to negative ? True or false

A

True. Points from P-N

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

If NO current is conducted at the base, then current can’t flow, what mode is this ?

A

Cutoff Mode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

When a transistor is used as an amplifier it is biased into ________\ mode of operation

A

Active mode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When a transistor is fully on and current flow between collector and emitter is at maximum, what mode ?

A

Saturation mode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

When testing a good BJT what is the voltage drop from base to emitter

A

0.7v

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

To turn on a NPN transistor, the voltage at the base must be more __________ then the emitter

A

Positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

To turn on a PNP transistor the voltage must be more ___________ then the emitter

A

Negative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Polarity of the collector on an NPN transistor

A

Positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Polarity of the collector on a PNP transistor ?

A

Negative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are two general applications where a transistor is used ?

A

Switching or Amplifications

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A diode is tested and measured 0V in forward, and 0V in reverse, the diode is ________?

A

Failed short

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

To turn off an SCR the anode current must be reduced below the devices ________ current

A

Holding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Three terminals on a BJT

A

Collector, Emitter, Base

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

3 terminals on a JFET

A

Gate, Drain, Source

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are two types of doping, used in a semiconductor?

A

P type
N type

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Which direction do electrons flow with respect to voltage polarity ?

A

Positive - negative

19
Q

How many layers in a single diode ?

A

2

20
Q

To turn on a N-channel EMosfet the voltage at the gate must be more ________ then the source terminal

A

Positive

21
Q

The polarity of the drain voltage on a NChan FET is _____?

A

Positive

22
Q

The polarity of the drain on a P-Channel FET is ________?

A

Negative

23
Q

What type of MOSFET operates like a normally open switch ?

A

E mosfet

24
Q

What transistor family has the highest power rating ?

A

IGBT

25
Q

What device family is the SCR?

A

Thyristors

26
Q

What forward and reverse measurement are expected when testing a SCR with its gate disconnected?

A

Open cct

27
Q

Decreasing the base current in a BJT will cause impedance to _______?

A

Increase

28
Q

To trigger a thyristor later then 90’ in a ac cycle, the gate must be phase shifted with a _________?

A

Capacitor

29
Q

The voltage that causes a diode to conduct in a reverse direction is what ?

A

Peak inverse voltage

30
Q

How many valence electrons do P type dopants have ?

A

3

31
Q

To turn on a SCR the anode must be made more ___________ then the cathode, and gate current must be ___________.

A

Positive & positve

32
Q

What terminal does a gate have to be connected to when testing a TRIAC?

A

T2

33
Q

Testing a BJT, base to collector = ________ voltage drop

A

OL

34
Q

Testing a BJT base to emitter = _______ voltage drop

A

.7v

35
Q

How many layers in a thyristor ?

A

4 layers

36
Q

Thyristor are latching devices, once triggered into ON state, they remain ON until current flow is reduced below _________ current

A

Holding

37
Q

Three terminals on a UJT

A

Base 1 , base 2, emitter

38
Q

3 terminals on a SCR ?

A

Anode, cathode, gate

39
Q

SCRS can only operate in _________ direction

A

Forward

40
Q

To turn on a SCR, ______voltage and current are applied to the gate with respect to cathode

A

Positve

41
Q

SCR with gate disconnected will measure what?

A

OL in either direction

42
Q

IN a SCR gate to cathode should register a voltage drop of ?

A

.7

43
Q

Jeff’s drug of choice ?

A

Percocet

Electronics (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions