The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ?
A. 2 W
B. 6 W
C. 68 W
D. None of the above
Answer: Option C
This Question Belongs to Electrical Engineering >> Multistage Transistor Amplifiers
Related Questions on Multistage Transistor Amplifiers
The gain of an amplifier is expressed in db because ___________
A. It is a simple unit
B. Calculations become easy
C. Human ear response is logarithmic
D. None of the above
RC coupling is not used to amplify extremely low frequencies because
A. There is considerable power loss
B. There is hum in the output
C. Electrical size of coupling capacitor becomes very large
D. None of the above
If the power level of an amplifier reduces to half, the db gain will fall by .
A. 5 db
B. 2 db
C. 10 db
D. 3 db
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