The pulsating d.c. applied to power amplifier causes________________?

Related Mcqs:

1. A 2-transistor class B power amplifier is commonly called ______________ amplifier?

   A. Dual
   B. Push-pull
   C. Symmetrical
   D. Differential

2. 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%

3. The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?

   A. 10 W
   B. 15 W
   C. 5 W
   D. 20 W

4. The output power of a transistor amplifier is more than the input power because the additional power is supplied by__________________?

   A. Transistor
   B. Biasing circuit
   C. Collector supply VCC
   D. None of the above

5. The pulsating torque exerted by steam locomotives causes which of the following ?

   A. Jolting and skidding
   B. Hammer blow
   C. Pitching
   D. All of the above

6. 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

7. 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

8. 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

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

   A. c. load line
   B. c. load line
   C. both d.c. and a.c. load lines
   D. none of the above

10. A class A power amplifier is sometimes called______________amplifier?

    A. Symmetrical
    B. Single-ended
    C. Reciprocating
    D. Differential