test 4

Question 1

The process by which impurities are added to a semiconducting material to change its electric characteristics is called

Answer 1

doping

Question 2

a silicon diode will not begin conducting forward current until appoximately ____ volts is applied across.

Answer 2

.7

Question 3

During ____ biasing, the depletion region ____, allowing no current to flow unless the breakdown voltage is reached

Answer 3

reverse

widens

Question 4

When voltage is applied to a diode, the action occurring in the _____ region either blocks current flow or passes current.

Answer 4

depletion

Question 5

current flows with against I

Answer 5

against

Question 6

while testing a diode, you recorded a high resistance with the positive test lead attached to the anode and the negative test lead attached to the cathode. You also recorded a high resistance with the leads reversed. You assume that the diode is ____

Answer 6

Open

Question 7

A circuit is designed to supply 10V at 250 milliamps. If a voltage doubler was applied the output would be ____ volts at _____ milliamps.

Answer 7

20

125

Question 8

Capacitive filter elements can be used for smoothing the output ____across the load.

Answer 8

voltage

Question 9

a diode will conduct normal current when the _____ is positive with respect to the _____

Answer 9

anode cathode

Question 10

current flow for circuit with zener diode

Answer 10

I=(Es-Ez)/R

Question 11

Zener knee location

Answer 11

when it flattens out

Question 12

zener diode parallel to output

Answer 12

output is same as zener

Question 13

The ____ converts AC to a _____ DC voltage.

Answer 13

Rectifier

pulsating

Question 14

What determines the load polarity of a power supply the AC converts to DC

Answer 14

diode

Question 15

a special type of diode called the _____ is used for amplifier and

Answer 15

tunnel diode

Question 16

P-type semiconductor have been doped with a _____ of free electrons.

Answer 16

deficiency

Question 17

The _____ current through a reverse biased diode will be in the microampre range

Answer 17

leakage

Question 18

when testing a zener diode with a VOM readings indicate a low resistance in both directions you could probably conclude the zener diode is ____

Answer 18

shorted

Question 19

the primary purpose of a zener diode is to act as a _____ either by itself or in conjunction with other semiconductor devices

Answer 19

voltage regulator

Question 20

list 4 ways that diodes can be used in signal and power circuits

Answer 20

detect radio waves
logic control
switching