A. Biasing the circuit
B. Collector efficiency
C. To keep the transformer cool
D. None of the above
Related Mcqs:
- A 2-transistor class B power amplifier is commonly called ______________ amplifier?
A. Dual
B. Push-pull
C. Symmetrical
D. Differential - 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% - 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 - 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 - A power amplifier has comparatively __________________ ß ?
A. Small
B. Large
C. Very large
D. None of the above - 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 - 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 - 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 - A class A power amplifier is sometimes called______________amplifier?
A. Symmetrical
B. Single-ended
C. Reciprocating
D. Differential - The output transformer used in a power amplifier is a _____________ transformer?
A. 1:1 ratio
B. Step-up
C. Step-down
D. None of the above
