Answer ALL questions. Look for any feedback given if you get an answer incorrect. Keep choosing an answer until you get it correct. CORRECT or INCORRECT answers are indicated at the TOP of the page. A score is given at the TOP of the page when the exercise has been completed.
What is the primary function of a semiconductor diode?
to block AC voltage/current
to block DC voltage/current
to amplify a signal
to hold an electrical charge
Diodes are constructed by sandwiching two semiconductor materials together. What are these materials called?
R and S
P and N
L and N
A and C
What name is given to the layer between the two semiconductor materials found in a diode?
deletion layer
depletion layer
expletion layer
conduction layer
A diode has two connections, what are they called?
anode and cathode
positive and negative
source and drain
live and ground
In order for a diode to 'conduct' how must it be connected?
forward biased
reverse biased
positive biased
negative biased
In order for a diode to 'not conduct' how must it be connected?
forward biased
reverse biased
positive biased
negative biased
In order for a diode to conduct, how is it connected to a dc (+) and (-) power source?
anode to (+) and cathode to (-)
anode to (-) and cathode to (+)
source to (-) and drain to (+)
source to (+) and drain to (-)
What is the approximate 'forward bias' voltage required for a diode?
0.6v
6v
16v
100v
What is the approximate 'peak inverse voltage' required for a diode?
0.6v
6v
16v
100v
What is the effect on a diode if the PIV is exceeded when it is connected in 'reverse bias'?
current flow decreases
high current will flow
the diode will not operate
current will suddenly be limited
What of the following statements is true regarding a 'zener' diode?
it works in the same way as a standard diode.
it conducts when a predetermined reverse breakdown voltage is reached.
it can only be used in a forward biased mode to limit voltage
it can be used to switch digital signals
What name is given to a semiconductor that generates light when current flows through it?
light emitting diode
liquid crystal display
plasma display
light dependent resistor
What name is given to a semiconductor that conducts when light is detected?
light emitting diode
photodiode
photocell
light dependent resistor
what is indicated by the red arrow (?) on this diode characteristics graph