Multi-Stage Transistor Amplifiers

A gain of 1000 times in voltage is expressed by_______________? A. 60 db B. 30 db C. 120 db D. 600 db

The upper or lower cut off frequency is also called______________frequency? A. Resonant B. SidebandC. 3 db D. None of the above

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 WC. 68 W D. None of the above

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 bandwidth of a single stage amplifier is_____________that of a multistage amplifier? A. More than B. The same as C. Less than D. Data insufficient

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? A. 5 mV B. 2 mV C. 8 mVD. 5 mV

If the power level of an amplifier reduces to half, the db gain will fall by___________? A. 5 db B. 2 db C. 10 dbD. 3 db

In the initial stages of a multistage amplifier, we use______________? A. RC coupling B. Transformer coupling C. Direct coupling D. None of the above

A gain of 1,000,000 times in power is expressed by_____________? A. 30 dbB. 60 db C. 120 db D. 600 db

In transistor amplifiers, we use_____________transformer for impedance matching? A. Step upB. Step down C. Same turn ratio None of the above