test 4 Flashcards
The process by which impurities are added to a semiconducting material to change its electric characteristics is called
doping
a silicon diode will not begin conducting forward current until appoximately ____ volts is applied across.
.7
During ____ biasing, the depletion region ____, allowing no current to flow unless the breakdown voltage is reached
reverse
widens
When voltage is applied to a diode, the action occurring in the _____ region either blocks current flow or passes current.
depletion
current flows with against I
against
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 ____
Open
A circuit is designed to supply 10V at 250 milliamps. If a voltage doubler was applied the output would be ____ volts at _____ milliamps.
20
125
Capacitive filter elements can be used for smoothing the output ____across the load.
voltage
a diode will conduct normal current when the _____ is positive with respect to the _____
anode cathode
current flow for circuit with zener diode
I=(Es-Ez)/R
Zener knee location
when it flattens out
zener diode parallel to output
output is same as zener
The ____ converts AC to a _____ DC voltage.
Rectifier
pulsating
What determines the load polarity of a power supply the AC converts to DC
diode
a special type of diode called the _____ is used for amplifier and
tunnel diode
