When an a.c. signal is applied to an amplifier, ,the operating point moves along_________________?

Related Mcqs:

1. An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?

   A. 8 db
   B. 6 db
   C. 5 db
   D. 4 db

2. If the maximum collector current due to signal alone is 3 mA, then zero signal collector current should be at least equal to___________________?

   A. 6 mA
   B. mA
   C. 3 mA
   D. 1 mA

3. In a CE amplifier, the phase difference between voltage across collector load RC and signal voltage is _________________?

   A. 180o
   B. 270o
   C. 90o
   D. 0o

4. The zero signal IC is generally ______________ mA in the initial stages of a transistor amplifier?

   A. 4
   B. 1
   C. 3
   D. More than 10

5. The output signal voltage and current of a power amplifier are 5V and 200 mA; the values being r.m.s. What is the power output ?

   A. 1 W
   B. 2 W
   C. 4 W
   D. None of the above

6. What will be the collector efficiency of a power amplifier having zero signal power dissipation of 5 watts and a.c. power output of 2 watts ?

   A. 20%
   B. 80%
   C. 40%
   D. 50%

7. When a multistage amplifier is to amplify d.c. signal, then one must use_____________coupling?

   A. RC
   B. Transformer
   C. Direct
   D. None of the above

8. When an input signal 1 is applied to a NOT gate, the output is ______________?

   A. 0
   B. 1
   C. Either 0 & 1
   D. None of the above

9. The same signal in Problem 2 is applied to an RC high-pass filter. If the reactance is zero at the input frequency, the output voltage is____________?

   A. 12.73 V peak-to-peak
   B. 18 V peak-to-peak
   C. 9 V peak-to-peak
   D. zero

10. 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