A. 1:1 ratio
B. Step-up
C. Step-down
D. None of the above
Related Mcqs:
- 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 - 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 - 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 W
C. 68 W
D. None of the above - A 2-transistor class B power amplifier is commonly called ______________ amplifier?
A. Dual
B. Push-pull
C. Symmetrical
D. Differential - The maximum efficiency of transformer coupled class A power amplifier is _______________?
A. 30%
B. 50%
C. 80%
D. 45% - A transformer coupled class A power amplifier has a load of 100 O on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?
A. 5 kO
B. 20 kO
C. 100 kO
D. 10 kO - Power amplifiers generally use transformer coupling because transformer permits______________?
A. Cooling of the circuit
B. Impedance matching
C. Distortionless output
D. Good frequency response - A 6 V battery output is divided down to obtain two output voltages. Three 2.2 kΩ resistors are used to provide the two taps. The two output voltages are___________?
A. 2 V, 4 V
B. 2 V, 2 V
C. 2 V, 6 V
D. 4 V, 6 V
