Types

Question 1

Types

Answer 1

Rectifier Diode
Shotkey Diode
Zener Diode
LED’s

Question 2

Under normal conditions a diode conducts current when it is

Answer 2

Forward Biased

Question 3

Arrowhead points?

Answer 3

the direction of the diode symbol’s “arrowhead” points against the direction of electron flow

Question 4

The term “diode” is customarily reserved for

Answer 4

small signal devices, I ≤ 1 A

Question 5

The term rectifier is used for

Answer 5

power devices, I > 1 A.

Question 6

Arrowhead points?

Answer 6

the direction of the diode symbol’s “arrowhead” points against the direction of electron flow
Facing out of Positive = allows current to flow
Facing out of negative = blocks current

Question 7

The term rectifier is used for

Answer 7

power devices, I > 1 A.

Question 8

forward-biased

Answer 8

polarity of the battery is such that electrons are allowed to flow through the diode

Question 9

forward-biased

Answer 9

polarity of the battery is such that electrons are allowed to flow through the diode

Question 10

Low voltage on diode means

Answer 10

high voltage through circuit

Question 11

cathode on real component

Answer 11

stripe

Question 12

Cathode

Answer 12

Postive N-type material

Question 13

Anode

Answer 13

Negative P-type semiconductor

Question 14

If Negitive terminal atached to poistive (N Type)

Answer 14

Forward Biased (Conductor)

Question 15

The term kT/q describes

Answer 15

the voltage produced within the P-N junction due to the action of temperature, and is called the thermal voltage, or Vt of the junction

Question 16

The term kT/q describes

Answer 16

the voltage produced within the P-N junction due to the action of temperature, and is called the thermal voltage, or Vt of the junction

Question 17

voltage drop across a conducting, semiconductor diode

Answer 17

constant at 0.7 volts for silicon and 0.3 volts for germanium.

Question 18

voltage drop across a conducting, semiconductor diode

Answer 18

constant at 0.7 volts for silicon and 0.3 volts for germanium.

Question 19

The maximum reverse-bias voltage that a diode can withstand without “breaking down” is

Answer 19

called the Peak Inverse Voltage, or PIV rating.

Question 20

How to Test diode

Answer 20

Switch to Ohm
Plug to Ohm
Cathode (Stripe) vs Postive = High resistance
Cathode (Stripe) vs Negative = Low resistance

Question 21

rectification is

Answer 21

the conversion of alternating current (AC) to direct current (DC)

Question 22

half-wave rectifier.

Answer 22

It only allows one half of an AC waveform to pass through to the load.

Question 23

Half-wave rectification W

Answer 23

however, a very simple way to reduce power to a resistive load.

Question 24

Half-wave rectification Application

Answer 24

Some two-position lamp dimmer switches apply full AC power to the lamp filament for “full” brightness and then half-wave rectify it for a lesser light output.

Question 25

full-wave rectifier Setup

Answer 25

center-tap design
Left=VAC ,transformer
Right=Two diodes(Both same direction),a lead to base of Load and Load

Question 26

full-wave rectifier ,1st half wave Current Flow

Answer 26

Left:starts cycling current
Right:Current flows through one diode only and then back through lead

Question 27

full-wave rectifier ,2nd half wave Current Flow

Answer 27

Left:starts cycling current opposite direction
Right:Current flows through lead and then back through other diode only