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 diode?
to store a charge
to reduce current flow in a circuit
to block current in one direction
to amplify a voltage
What type of component is shown here?
semiconductor device (DIL)
semiconductor device (SM)
bridge rectifier
thyristor
What material forms the basis of this component?
silicon
copper
gold
platinum
What is the name given to the '?' unknown layer shown on this diagram.
depletion layer
conduction layer
semiconductor layer
silicon layer
How has the diode that this diagram represents been connected so that no current can flow through it?
Reverse Bias
Forward Bias
Low Bias
High Bias
How has the diode that this diagram represents been connected so tat current can flow through it?
Forward Bias
Reverse Bias
Low Bias
High Bias
What term is given to the point shown on this Diode characteristics graph?
total reverse voltage
forward bias voltage
peak inverse voltage
reverse bias voltage
What term is given to the point shown on this silicon diode characteristics graph?
total reverse voltage drop
forward bias voltage drop
peak inverse voltage drop
reverse bias voltage drop
What is the approx forward bias voltsdrop for a germanium semiconductor diode?
70v
0.7v
0.2v
1v
What is the name of the missing terminal on this diode schematic ?
anode
electrode
gate
base
What is the name of the missing connection on this diode schematic ?
cathode
anode
source
drain
What kind of rectification is shown here ?
half wave
positive wave
full wave
pulse wave
What type of rectifier output is shown here ?
full wave
pulse wave
half wave
positive wave
What type of semiconductor device is shown here?
thermistor
transistor
thyristor
opto-coupler
What type of semiconductor device is shown here?
thermistor
transistor
thyristor
opto-coupler
What type of semiconductor device is shown here?
photo transistor
field effect transistor
thyristor
opto-coupler
What type of semiconductor switching device is shown here?
photo transistor
field effect transistor
thyristor
opto-coupler
What type of semiconductor switching device is shown here?
photo transistor
field effect transistor
thyristor
opto-coupler
How should a thyristor be 'turned off' once its 'switched on'?
pulse the gate
switch off the base
reverse the supply voltage
increase the applied voltage
What are the three terminals found on a thyristor - as shown here?
base, collector, emitter
gate, source, drain
anode, cathode, gate
base, source, emitter
What are the three terminals found on a transistor - as shown here?
base, collector, emitter
gate, source, drain
anode, cathode, gate
base, source, emitter
What symbol and component is shown here?
transistor
thyristor
field effect transistor
light dependent transistor
What is the function of the semiconductor device in this circuit?
as a switch
as an amplifier
as a voltage regulator
as a rectifier
What is the function of the semiconductor device in this circuit?
as a switch
as an amplifier
as a voltage regulator
as a rectifier
What are the two material types used in semiconductor devices?
P and N
L and N
+ and -
electrons and holes
What is the function of these components?
To limit current
to store a charge
to amplify a signal
to block AC
What is the function of these components when connected to an AC supply?
To limit current
to store a charge
to act as a switch
to set up opposing current
What is the function of these components?
To limit current
to store a charge
to act as a switch
to set up opposing current
What is the function of these components?
To limit current
to store a charge
to block AC
to set up opposing current
How should a thyristor be 'turned off' once its 'switched on'?
pulse the gate
switch off the base
switch off the supply voltage
increase the applied voltage
What is the effect of a capacitor in a 'coupling circuit' arrangement?
it blocks AC voltage
it blocks DC voltage
it increases AC frequency
it reduces AC frequency
What is the effect of a capacitor in a 'de-coupling circuit' arrangement?