Q.1.
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 ?
Q.2.
A gain of 1,000,000 times in power is expressed by ___________
Q.3.
In the initial stages of a multistage amplifier, we use ___________
Q.4.
A radio receiver has ___________ of amplification
Q.5.
In an RC coupling scheme, the coupling capacitor CC must be large enough ___________
Q.6.
In transistor amplifiers, we use ___________ transformer for impedance matching
Q.7.
The output of a microphone is rated at -52 db. The reference level is 1V under specified conditions. What is the output voltage of this microphone under the same sound conditions?
Q.8.
If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is ___________
Q.9.
A gain of 1000 times in voltage is expressed by ___________
Q.10.
RC coupling is used for ___________ amplification
Q.11.
Transformer coupling is used for ___________ amplification
Q.12.
The lower and upper cut off frequencies are also called ___________ frequencies
Q.13.
In practice, voltage gain is expressed ___________
Q.14.
In practice, voltage gain is expressed ___________
Q.15.
The total gain of a multistage amplifier is less than the product of the gains of individual stages due to ___________
Q.16.
In transistor amplifiers, we use ___________ transformer for impedance matching
Q.17.
The frequency response of transformer coupling is ___________
Q.18.
The purpose of RC or transformer coupling is to ___________
Q.19.
Transformer coupling is generally employed when load resistance is
Q.20.
The bandwidth of a single stage amplifier is ___________ that of a multistage amplifier