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 ?

Related Mcqs:

1. 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...

2. 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...

3. If the zero signal dissipation of a transistor is 1W, then power rating of the transistor should be at least___________________?

   A. 5 W B. 33 W C. 75 W D. 1 W...

4. 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...

5. Class_____________ power amplifier has the highest collector efficiency ?

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

6. 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...

7. If the power rating of a transistor is 1W and collector current is 100mA, then maximum allowable collector voltage is________________?

   A. 1V B. 100V C. 20V D. 10V...

8. A silicon transistor is biased with base resistor method. If ß=100, VBE =0.7 V, zero signal collector current IC = 1 mA and VCC = 6V , what is the value of the base resistor RB ?

   A. 105 kO B. 530 kO C. 315 kO D. None of the above...

9. 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...

10. The value of collector load RC in a transistor amplifier is _______________the output impedance of the transistor?

    A. The same as B. Less than C. More than D. None of the above...