23
I_N_QizITIVE
s~T-AR-*T_E-CH_J_ou-R-NA-L/-MA-Y-19-83
___
40. The operation of a 41. The three basic
42. When a transistor 43. A transistor can act 44. Electrons flow
regions of a
regulates current, it
as a switch if it is
through the working
transistor is an
or output circuit from
example of the basic
transistor are:
is said to be
especially built and
"amplifying"
a power source and
connected so that it
function of all semi-
a) Collector, bias,
current because:
typically return to
conductor devices,
emitter
a) Providesavoltage
the power source via:
which is:
a) The collector
increase at the
b) Emitter, base,
"collects"
a) The generator
a) Switching and
conductor
output which is
electrons
directly propor-
b) Thebase
regulating the
c) Emitter, base,
b) Thevoltageatthe
connection of a
collector
tional to the
flow of electrons
transistor
emitter is greater
signal at the input
b) Too complex to
d) Cathode, grid,
c) A wire assumed
plate
than the voltage
b) Allows the
understand
current crossing
to be constantly
at the base
c) Raising the
e) Noneoftheabove
at zero voltage,
c) Thecurrentinthe
its emitter to be
voltage of the
working or output
called" ground",
lower than its
circuit
output
which often is
circuit is greater
d) Withdrawing
actually the earth
than the current
c) Either allows full
electrons
d) A rectifier diode
in the control or
power to flow in
e) c and d above
which converts
input circuit
the working cir-
cuit, or allows no
ACtoDC
d) Noneoftheabove
INQUIZITIVE ANSWERS (APRIL)
e) Noneoftheabove
e) All of the above
current at all to
flow in the work-
36. a
ing circuit
37. b
d) Noneoftheabove
38. a
e) All of the above
39.
C
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