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 ?
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 ?
In an RC coupling scheme, the coupling capacitor CC must be large enough ___________
In an RC coupling scheme, the coupling capacitor CC must be large enough ___________
The number of stages that can be directly coupled is limited because
The number of stages that can be directly coupled is limited because
In the initial stages of a multistage amplifier, we use ___________
In the initial stages of a multistage amplifier, we use ___________
A gain of 1,000,000 times in power is expressed by ___________
A gain of 1,000,000 times in power is expressed by ___________
The final stage of a multistage amplifier uses ___________
The final stage of a multistage amplifier uses ___________
The best frequency response is of ___________ coupling
The best frequency response is of ___________ coupling
The gain of an amplifier is expressed in db because ___________
The gain of an amplifier is expressed in db because ___________
A radio receiver has ___________ of amplification
A radio receiver has ___________ of amplification
A current amplification of 2000 is a gain of ___________
A current amplification of 2000 is a gain of ___________
RC coupling is used for ___________ amplification
RC coupling is used for ___________ amplification
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?
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?
If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is ___________
If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is ___________
If the power level of an amplifier reduces to half, the db gain will fall by .
If the power level of an amplifier reduces to half, the db gain will fall by .
The upper or lower cut off frequency is also called ___________ frequency
The upper or lower cut off frequency is also called ___________ frequency
RC coupling is not used to amplify extremely low frequencies because
RC coupling is not used to amplify extremely low frequencies because
In transistor amplifiers, we use ___________ transformer for impedance matching
In transistor amplifiers, we use ___________ transformer for impedance matching
RC coupling is generally confined to low power applications because of
RC coupling is generally confined to low power applications because of
The total gain of a multistage amplifier is less than the product of the gains of individual stages due to ___________
The total gain of a multistage amplifier is less than the product of the gains of individual stages due to ___________
In an RC coupled amplifier, the voltage gain over mid-frequency range ___________
In an RC coupled amplifier, the voltage gain over mid-frequency range ___________
In RC coupling, the value of coupling capacitor is about ___________
In RC coupling, the value of coupling capacitor is about ___________
The bandwidth of a single stage amplifier is ___________ that of a multistage amplifier
The bandwidth of a single stage amplifier is ___________ that of a multistage amplifier
A gain of 1000 times in voltage is expressed by ___________
A gain of 1000 times in voltage is expressed by ___________
An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?
An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?
When a multistage amplifier is to amplify d.c. signal, then one must use coupling
When a multistage amplifier is to amplify d.c. signal, then one must use coupling
1 db corresponds to ___________ change in power level
1 db corresponds to ___________ change in power level
The purpose of RC or transformer coupling is to ___________
The purpose of RC or transformer coupling is to ___________
___________ coupling provides the maximum voltage gain
___________ coupling provides the maximum voltage gain
In obtaining the frequency response curve of an amplifier, the ___________
In obtaining the frequency response curve of an amplifier, the ___________
An advantage of RC coupling scheme is the ___________
An advantage of RC coupling scheme is the ___________
Transformer coupling is used for ___________ amplification
Transformer coupling is used for ___________ amplification
1 db corresponds to ___________ change in voltage or current level
1 db corresponds to ___________ change in voltage or current level
The ear is not sensitive to ___________
The ear is not sensitive to ___________
Transformer coupling is generally employed when load resistance is
Transformer coupling is generally employed when load resistance is
The frequency response of transformer coupling is ___________
The frequency response of transformer coupling is ___________
The lower and upper cut off frequencies are also called ___________ frequencies
The lower and upper cut off frequencies are also called ___________ frequencies
In practice, voltage gain is expressed ___________
In practice, voltage gain is expressed ___________
