A-004-04: Regulated power supplies
A-004-04-01:
In a series-regulated power supply, the power dissipation of the pass transistor is:
directly proportional to the load current and the input/output voltage differential
the inverse of the load current and the input/output voltage differential
dependent upon the peak inverse voltage appearing across the Zener diode
indirectly proportional to the load voltage and the input/output voltage differential
A-004-04-02:
In any regulated power supply, the output is cleanest and the regulation is best:
at the point where the sampling network or error amplifier is connected
across the secondary of the pass transistor
across the load
at the output of the pass transistor
A-004-04-03:
When discussing a power supply the _______ resistance is equal to the output voltage divided by the total current drawn, including the current drawn by the bleeder resistor:
load
ideal
rectifier
differential
A-004-04-04:
The regulation of long-term changes in the load resistance of a power supply is called:
static regulation
active regulation
analog regulation
dynamic regulation
A-004-04-05:
The regulation of short-term changes in the load resistance of a power supply is called:
dynamic regulation
static regulation
analog regulation
active regulation
A-004-04-06:
The dynamic regulation of a power supply is improved by increasing the value of:
the output capacitor
the choke
the input capacitor
the bleeder resistor
A-004-04-07:
The output capacitor, in a power supply filter used to provide power for an SSB or CW transmitter, will give better dynamic regulation if:
the output capacitance is increased
the negative terminal of the electrolytic is connected to the positive and the positive terminal to ground
a battery is placed in series with the output capacitor
it is placed in series with other capacitors
A-004-04-08:
In a regulated power supply, four diodes connected together in a BRIDGE act as:
a rectifier
equalization across the transformer
matching between the secondary of the power transformer and the filter
a tuning network
A-004-04-09:
In a regulated power supply, components that conduct alternating current at the input before the transformer and direct current before the output are:
fuses
capacitors
diodes
chokes
A-004-04-10:
In a regulated power supply, the output of the electrolytic filter capacitor is connected to the:
voltage regulator
pi filter
solid-state by-pass circuit
matching circuit for the load
A-004-04-11:
In a regulated power supply, a diode connected across the input and output terminals of a regulator is used to:
protect the regulator
provide an RF by-pass for the voltage control
provide additional capacity
protect the regulator from voltage fluctuations in the primary of the transformer
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