Ana-Test

Question 1

How many Valance electrons does a silicon atom have

Answer 1

4

Question 2

what is the most widely used semiconductor

Answer 2

none of the above

Question 3

When voltage is applied to a semiconductor then holes will flow

Answer 3

none of the above

Question 4

what causes the depletion zone

Answer 4

recombination

Question 5

in a silicon diode the reverse current is usually

Answer 5

very small

Question 6

what about the breakdown voltage of the zener diode

Answer 6

a reverse-biased Zener diode exhibits a 
controlled breakdown and allows 
the current to keep 
the voltage 
close to the 
Zener breakdown voltage.

Question 7

what happens if 
conventional diode is 
reverse-biased 
above its 
reverse breakdown voltage.

Answer 7

reverse bias breakdown voltage is 
exceeded, 
conventional diode is subject to 
high current due to 
avalanche breakdown.

Question 8

For example, a diode with

Answer 8

a Zener breakdown voltage of 3.2 V 
exhibits a voltage drop of very 
nearly 3.2 V across a 
wide range of 
reverse currents

Question 9

1 thing about picture of a Zener Graph

Answer 9

change of voltage scale between the 
forward biased and 
reverse biased (negative)

Question 10

Symbol for Zener

Answer 10

Arrow and Crowbar

Question 11

Describe the zener diode

Answer 11

When in parallel with a 
variable voltage source so that it is 
reverse biased
conducts when the 
voltage reaches the diode's 
reverse breakdown voltage.

Question 12

Zener used as

Answer 12

Reference Voltage

Question 13

any semiconductor is

characterized as

Answer 13

negative temperature co efficient

Question 14

Breakdown current
does not destroy the
zener diode
providing it doesn’t

Answer 14

go above

maximum breakdown Voltage

Question 15

a shotkey diode is

characterized as

Answer 15

same polarity
of carriers on
both sides

Question 16

Define PIV

Answer 16

Peak Inverse Voltage
Line down
Reverse Bias
Just Before
Reverse Breakdown Voltage

Question 17

Define Reverse Breakdown voltage

Answer 17

Line down
Reverse Bias
Just after
Drop off

Question 18

Define threshold voltage

Answer 18

an amount of 
"forward" bias where the 
current flowing becomes 
measurable
typically 0.7 VDC.

Question 19

Define leakage current

Answer 19

Current that 
the diode will 
leak when a 
reverse voltage is 
applied to it.

Question 20

Label Axis of
SI and
Ge Diode

Answer 20

IF

VR VF

     IR

Question 21

SI Line

Answer 21

Long
Sideways
Zed

Question 22

GI Line

Answer 22

Short
Sideways
Zed

Question 23

Reverse blocking region

Answer 23

The block of reverse Bias 
in which
Diode is blocking current
Before
Breaking down

Question 24

What is reverse voltage rating

Answer 24

Maximum voltage

before damage

Question 25

Where is max allowable power dissipation

Answer 25

data sheets

Question 26

Out of Circuit Test: Step 1

Answer 26

Power Off | Lift one end of Diode

Question 27

Out of Circuit Test: Step 2

Answer 27

Ohm Meter Connect Pos to Pos Then Pos to Neg

Question 28

Out of Circuit Test : One reading is small

Answer 28

One reading is small compared to other GOOD

Question 29

Out of Circuit Test: Both readings are low

Answer 29

Both readings are low | SHORTED

Question 30

Out of Circuit Test: Both readings are High

Answer 30

Both readings are High | OPEN CIRCUIT

Question 31

What is rectification

Answer 31

Turning AC into DC

Question 32

Half Wave Rectifier Step 1

Answer 32

Source(Vpri) Volt Primary Hertz

Question 33

Half Wave Rectifier Step 2

Answer 33

Transformer(T1) Turns:Turns Voltage Secondary(Vsec)

Question 34

Half Wave Rectifier Step 3

Answer 34

1 x Diode (VD) | 0.7 Volts

Question 35

Half Wave Rectifier Step 4

Answer 35

Load(RL)

Question 36

Half Wave Rectifier Step 5

Answer 36

VRL is just the top half of cycle

Question 37

Half Wave Rectifier Step 6

Answer 37

Voltmeter In Parallel | Ohmmeter In Series

Question 38

Transformer Formula

Answer 38

Npr = Vpr = Isec | Nsec Vsec Ipr

Question 39

Center Tapped Full Wave Rectifier Step 1

Answer 39

Source(Vpri) Volt Primary Hertz

Question 40

Center Tapped Full Wave Rectifier Step 2

Answer 40

Transformer(T1) Turns:Turns Voltage Secondary(Vsec) Center Tap

Question 41

Center Tapped Full Wave Rectifier Step 3

Answer 41

2 x Diode (VD) 0.7 Volts Loop

Question 42

Center Tapped Full Wave Rectifier Step 4

Answer 42

Off loop RL Ground

Question 43

Full Wave Bridge Rectifier Step 1

Answer 43

Source(Vpri) Volt Primary Hertz

Question 44

Full Wave Bridge Rectifier Step 2

Answer 44

Transformer(T1) Turns:Turns Voltage Secondary(Vsec)

Question 45

Full Wave Bridge Rectifier Step 3

Answer 45

4 x Diode (VD) 0.7 Volts Loop Center Tap

Question 46

Full Wave Bridge Rectifier Step 4

Answer 46

Off loop RL Ground

Question 47

Filter

Answer 47

Full Wave Bridge Rectifier | + Capacitor parallel to RL

Question 48

Describe Clipping Circuit

Answer 48

Used to clip off part of an input signal without distorting the rest of the wave

Question 49

Clipping Circuit Step 1

Answer 49

Resistor | Line across top

Question 50

Clipping Circuit Step 2

Answer 50

2 Diodes | Alternating bias

Question 51

Clipping Circuit Step 3

Answer 51

2 Batteries Make up Remainder

Question 52

Polarity Circuit

Answer 52

A diode in positive line

Question 53

Polarity Circuit Description

Answer 53

``` Prevent circuit from being Energized with Supply Wrong way round ```

Question 54

Describe free wheeling diode

Answer 54

A conductive pass that handles back EMF form relays

Question 55

Free Wheeling Diode Circuit

Answer 55

A relay A path around A reverse biased Diode