The maximum efficiency of transformer coupled class A power amplifier is _______________?

Related Mcqs:

1. 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...

2. 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...

3. The maximum efficiency of resistance loaded class A power amplifier is _________________?

   A. 5% B. 50% C. 30% D. 25%...

4. 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...

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

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

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. In an RC coupled amplifier, the voltage gain over mid-frequency range_____________?

   A. Changes abruptly with frequency B. Is constant C. Changes uniformly with frequency D. None of the above...

8. Power amplifiers generally use transformer coupling because transformer permits______________?

   A. Cooling of the circuit B. Impedance matching C. Distortionless output D. Good frequency response...

9. 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...

10. Class_____________ power amplifier has the highest collector efficiency ?

    A. C B. A C. B D. AB...