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 ?

Related Mcqs:

A radio receiver has____________of amplification?

A. One stage B. Two stages C. Three stages D. More than one stages...

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...

The final stage of a multistage amplifier uses______________?

A. RC coupling B. Transformer coupling C. Direct coupling D. Impedance coupling...

The number of stages that can be directly coupled is limited because___________?

A. Changes in temperature cause thermal instability B. Circuit becomes heavy and costly C. It becomes difficult to bias the circuit D. None of the above...

The upper or lower cut off frequency is also called______________frequency?

A. Resonant B. Sideband C. 3 db D. None of the above...