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

Related Mcqs:

1. 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%

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. 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

4. 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

5. For the same a.c. power output as above, what should be the minimum power rating of transistor for class B operation?

   A. 10 W
   B. 4 W
   C. 8 W
   D. None of the above

6. The class B push-pull circuit can deliver 100 W of a.c. output power. What should be the minimum power rating of each transistor ?

   A. 20 W
   B. 40 W
   C. 10 W
   D. 80 W

7. The zero signal IC is generally ______________ mA in the initial stages of a transistor amplifier?

   A. 4
   B. 1
   C. 3
   D. More than 10

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. In the zero signal conditions, a transistor sees _____________ load?

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

10. 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