ATT TEST 8 EXAM WITH 100

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ATT TEST 8 EXAM WITH 100

QUESTIONS AND 100% CORRECT DETAILED

ANSWERS LATEST GRADED A+

• What are 5 parts of a power supply? ********ANSWER ******** Input, rectifier, filter,

regulator, protection

• Which two parts of a power supply are optional? ********ANSWER ******** Regulator

and protection

• What is the purpose of a power supply? ********ANSWER ******** To convert AC

power into smooth DC power

• What does the input of a power supply do? ********ANSWER ******** Step up or down

the AC input voltage

• What does the rectifier do in a power supply? ********ANSWER ******** Changes AC

into pulsating DC

• What does the filter do in a power supply? ********ANSWER ******** Changes pulsating

DC into smooth DC

• How type of components do filters use? ********ANSWER ******** Reactive

components

• What does a regulator do in a power supply? ********ANSWER ******** maintains the

output voltage at a constant level despite changes in load current

• What does the protection circuit do in power supply? ********ANSWER ********

Prevents damage to power supply if load becomes faulty, limits or disables output

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• The half wave rectifier is the same as what circuit? ********ANSWER ******** Series

limiter

• Which rectifier is the least efficient using only half the input? ********ANSWER ********

Half-wave

• Which two rectifiers require two input signals 180 degrees out of phase?-

********ANSWER ******** Full-wave and bridge

• Which rectifier uses a center tapped transformer? ********ANSWER ******** Full wave

• How is frequency determined for half wave rectifier? ********ANSWER ********

Output frequency is same as input frequency

• How is frequency determined for full wave rectifier? ********ANSWER ******** Output

is twice the input frequency

• How is frequency determined for bridge rectifier? ********ANSWER ******** Output is

twice the input frequency

• What is the purpose of series voltage regulators? ********ANSWER ******** To adjust

voltage drop to maintain V out at constant level

• In a series voltage regulator, V out INCREASES when what happens? ********ANSWER

******** Load current decreases OR DC input increases

• In series voltage regulator, V out DECREASES when what happens? ********ANSWER

******** Load current increases OR DC input decreases

• If load current decreases or DC input increases, what needs to be done to maintain constant

level of V out (series volt regulator)? ********ANSWER ******** Increase R1 resistance to increase voltage drop on R1

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