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.
Bi-polar Transistors have three connections. What are they called?
gate, source and drain
anode, cathode and gate
collector, emitter, base
positive, negative and earth
Transistors are primarily used in which one of the following applications ?
amplification
analogue conversion
signal conditioning
AC to DC conversion
How many ways are the P and N materials arranged when transistors are manufactured?
only one way
two different ways
three different ways
unlimited
In a PNP transistor, which connection is used to 'switch it on'?
base
collector
emitter
source
Field Effect Transistors (FET's) have three connections. What are they called?
gate, source and drain
anode, cathode and gate
collector, emitter, base
positive, negative and earth
What type of transistor uses light to proportionally control current flow through collector/emitter junction?
photo
field effect
bi-polar
integrated circuit
Thyristors have three connections. What are they called?
gate, source and drain
anode, cathode and gate
collector, emitter, base
positive, negative and earth
What semiconductor component is also known as an SCR (silicon controlled rectifier)?
bi-polar transistor
field effect transistor
thyristor
zener diode
How do you stop a thyristor conducting once it has been turned on?
remove the voltage to the gate
apply a voltage to the gate
switch off the current flow through the anode/cathode
pulse the gate
How is a thyristor switched on?
remove the voltage to the gate
apply a continuous voltage to the gate
switch off the current flow through the anode/cathode
pulse the gate with a voltage
TRIACs have three connections. What are they called?
gate, source and drain
anode, cathode and gate
collector, emitter, base
MT1, MT2 and gate
What function does a TRIAC perform?
signal amplification
full AC waveform control
voltage voltage control
digital switching
What name is given to the component that performs the same function as a bi-directional zener diode?
DIAC
TRIAC
FET
IC
identify the function of this circuit
dimmer switch
simple amplifier
photo-electric switch
PIR (passive infra-red) controller
Transistors are primarily used in which one of the following applications ?