Q.1.
The output of a microphone is rated at -db. The reference level isunder specified conditions. What is the output voltage of this microphone under the same sound conditions?
Q.2.
In RC coupling, the value of coupling capacitor is about ___________
Q.3.
The ear is not sensitive to ___________
Q.4.
RC coupling is generally confined to low power applications because of
Q.5.
RC coupling is generally confined to low power applications because of
Q.6.
___________ coupling provides the maximum voltage gain
Q.7.
If a three-stage amplifier has individual stage gains ofdb, 5 db anddb, then total gain in db is ___________
Q.8.
In obtaining the frequency response curve of an amplifier, the ___________
Q.9.
An amplifier receives 0.1 W of input signal and deliversW of signal power. What is the power gain in db?
Q.10.
1 db corresponds to ___________ change in power level
Q.11.
A gain oftimes in voltage is expressed by ___________
Q.12.
A gain of 1,000,times in power is expressed by ___________
Q.13.
The power output of an audio system isW. 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 ?
Q.14.
When a multistage amplifier is to amplify d.c. signal, then one must use coupling
Q.15.
An advantage of RC coupling scheme is the ___________
Q.16.
In an RC coupling scheme, the coupling capacitor CC must be large enough ___________
Q.17.
1 db corresponds to ___________ change in voltage or current level
Q.18.
The best frequency response is of ___________ coupling
Q.19.
The upper or lower cut off frequency is also called ___________ frequency
Q.20.
The lower and upper cut off frequencies are also called ___________ frequencies