1|Page
ATT TEST 5 EXAM LATEST 2025-2026 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED AND GRADED A+)||
Which class of amp is more efficient than class A and has
higher fidelity than class B? - ANSWER-Class AB
Which class of amp has the best efficiency but worst
fidelity? - ANSWER-Class C
What is DC bias at for class C amp? - ANSWER-BELOW
cutoff
C1 and C2 input/output coupling capacitors do what in
common emitter circuits? - ANSWER-Pass AC and block
DC
,2|Page
What is DC bias for a Class A amp? - ANSWER-ABOVE
cutoff (like AB)
What is the purpose of cascade (multistage) amps? -
ANSWER-To increase gain
What are 4 types of coupling methods for multistage
amps? - ANSWER-RC, LC, Transformer, Direct
What is the most common coupling method for cascade
amps? - ANSWER-RC
,3|Page
What is a disadvantage of RC coupling? - ANSWER-Low
frequency response
Which coupling method has the least effect on collector
AC signal? - ANSWER-LC
When is transformer coupling used for multistage amps? -
ANSWER-When you want to amplify only a select
frequency
What is a disadvantage of direct coupling? - ANSWER-
amplifies any signal, AC or DC, including unwanted
signals
, 4|Page
How is normal operation verified in RC coupled amps? -
ANSWER-Comparing TOTAL measured and calculated
voltage gains
Does gain (Av) increase or decrease when loaded? -
ANSWER-Decreases (due to parallel resistances)
What is the effect on LOW frequency in RC coupled
amps? Are individual stages affected? - ANSWER-Low
frequency decreases total gain but individual stages are
NOT affected
What happens if frequency is too HIGH in RC coupled
amps? - ANSWER-Reduces total gain
ATT TEST 5 EXAM LATEST 2025-2026 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED AND GRADED A+)||
Which class of amp is more efficient than class A and has
higher fidelity than class B? - ANSWER-Class AB
Which class of amp has the best efficiency but worst
fidelity? - ANSWER-Class C
What is DC bias at for class C amp? - ANSWER-BELOW
cutoff
C1 and C2 input/output coupling capacitors do what in
common emitter circuits? - ANSWER-Pass AC and block
DC
,2|Page
What is DC bias for a Class A amp? - ANSWER-ABOVE
cutoff (like AB)
What is the purpose of cascade (multistage) amps? -
ANSWER-To increase gain
What are 4 types of coupling methods for multistage
amps? - ANSWER-RC, LC, Transformer, Direct
What is the most common coupling method for cascade
amps? - ANSWER-RC
,3|Page
What is a disadvantage of RC coupling? - ANSWER-Low
frequency response
Which coupling method has the least effect on collector
AC signal? - ANSWER-LC
When is transformer coupling used for multistage amps? -
ANSWER-When you want to amplify only a select
frequency
What is a disadvantage of direct coupling? - ANSWER-
amplifies any signal, AC or DC, including unwanted
signals
, 4|Page
How is normal operation verified in RC coupled amps? -
ANSWER-Comparing TOTAL measured and calculated
voltage gains
Does gain (Av) increase or decrease when loaded? -
ANSWER-Decreases (due to parallel resistances)
What is the effect on LOW frequency in RC coupled
amps? Are individual stages affected? - ANSWER-Low
frequency decreases total gain but individual stages are
NOT affected
What happens if frequency is too HIGH in RC coupled
amps? - ANSWER-Reduces total gain
