Power Supplies And Amplifiers

Question 0

How many sections do power supplies usually have?

Answer 0

5

Question 1

What is the purpose of a power supply?

Answer 1

To convert AC power to DC power

Question 2

What is the purpose of a power supplies input circuit?

Answer 2

To step up or step down to AC input power

Question 3

True or false a transformer is used in a power supplies and input circuit?

Answer 3

True

Question 4

What is the purpose of a power supplies rectifier circuit?

Answer 4

To convert AC to pulsating DC

Question 5

What is the purpose of a power supplies filter circuit?

Answer 5

To change pulsating AC to smooth DC

Question 6

What is the purpose of a power supplies regulator circuit?

Answer 6

To maintain a constant output voltage

Question 7

What is the purpose of a power supplies protection circuit?

Answer 7

To prevent damage to the power supply

Question 8

What are used in a power supply filter circuit?

Answer 8

Reactive components

Question 9

How many diodes are used in a half wave rectifier circuit?

Answer 9

One

Question 10

How many diodes does a full wave rectifier use?

Answer 10

Two

Question 11

How many diodes are used in a bridge rectifier circuit?

Answer 11

Four

Question 12

What is the purpose of a half/full wave rectifier circuit?

Answer 12

To convert AC to pulsating DC

Question 13

In a half wave rectifier diode performs rectification and load resistor develops what?

Answer 13

Output

Question 14

In a full and a half wave rectifier a continuous AC produces what?

Answer 14

It continuous pulsating output at the same frequency

Question 15

In a half wave rectifier a continuous AC input produces a pulsating output frequency at how many times the input frequency?

Answer 15

Twice

Question 16

What is the purpose of a bridge rectifier circuit?

Answer 16

To convert AC to pulsating DC

Question 17

What is the purpose of the diodes D1- D4 in a bridge rectifier?

Answer 17

Reification

Question 18

In a bridge rectifier what develops the output signal?

Answer 18

RL

Question 19

What is the purpose of a series voltage regulator?

Answer 19

Adjust it voltage drop to maintain a constant eat out

Question 20

In a voltage regulator what Adjust voltage drop under varying conditions?

Answer 20

R1

Question 21

What is the purpose of a parallel voltage regulator?

Answer 21

It adjust its current flow to maintain a constant Eout

Question 22

When Ford biased a Zener dido acts like a junction diode having a voltage drop of how many volts?

Answer 22

0.7

Question 23

When reverse biased Zener diode acts like what?

Answer 23

Open switch

Question 24

When reverse biased above the breakdown (Vz) Zener diode has a voltage drop equal to what?

Answer 24

The Vz

Question 25

What is the purpose of a Zener diode regulator circuits?

Answer 25

To maintain a constant Vout

Question 26

In a Zener diode regulator Q1 maintains a constant emitter voltage by effectively doing what?

Answer 26

Changing its internal emitter to collector resistance

Question 27

What are the five sections of a power supply?

Answer 27

Input, rectifier, filter, regulator, protection.

Question 28

What section of the power supply uses a transformer to step up or step down the AC voltage?

Answer 28

Input

Question 29

What section of the power supply turns AC into pulsating DC?

Answer 29

Rectifier

Question 30

What section of the power supply turns pulsating DC into smooth unregulated DC?

Answer 30

Filter

Question 31

What section of the power supply maintains a constant DC voltage?

Answer 31

Regulator

Question 32

What section of the power supply the text to circuit from overload?

Answer 32

Protection

Question 33

What is the purpose of the half wave rectifier, full wave rectifier, and the bridge rectifier?

Answer 33

Turn AC into pulsating DC

Question 34

What is the purpose of a series voltage regulator, Parallel voltage regulator, and a Zener voltage regulator is?

Answer 34

Maintain a constant DC voltage

Question 35

In an IC voltage regulator 78 means you have what type of voltage?

Answer 35

Positive

Question 36

IC voltage regulator 79 means you have what type of voltage?

Answer 36

Negative

Question 37

What is the purpose of a general multistate transistor amplifier?

Answer 37

To increase gain

Question 38

In a general multistage transistor amplifier cascade refers to what?

Answer 38

How the output of the amplifier is applied to the input of another

Question 39

When several amplifiers are connected together each amp is called what?

Answer 39

Stage

Question 40

Most stages are designed to have a gain of what?

Answer 40

10

Question 41

What are the four methods of cascading?

Answer 41

RC coupling, LC coupling, transformer coupling, and direct couple

Question 42

True or false, FETs are a normally off device

Answer 42

False

Question 43

In an FET with a P channel, which way does current flow?

Answer 43

From drain to source

Question 44

In an FET with a N channel, which way does current flow?

Answer 44

From source to drain

Question 45

Current carries enter the FET through what?

Answer 45

Source

Question 46

Current carriers leave the FET through what?

Answer 46

Drain (Id)

Question 47

Flow of current carriers through the FET are controlled by what?

Answer 47

Gate

Question 48

What do FETs operate on?

Answer 48

Small reverse bias

Question 49

What refers to the voltage difference between the gate and the source?

Answer 49

Vgs

Question 50

Is Vgs increases, what happens to ID?

Answer 50

Decrease