What turn ratio (Np/Ns) of transformer is required to match 4 O speaker to a transistor having an output impedance of 8000 O ?

Related Mcqs:

1. 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...

2. A transistor amplifier has high output impedance because ______________?

   A. Emitter is heavily doped B. Collector has reverse bias C. Collector is wider than emitter or base D. None of the above...

3. 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...

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. The ratio of output impedance of a CE amplifier is _______________?

   A. About 1 B. Low C. High D. Moderate...

6. Two oppositely charged balls A and B attract third conducting ball C when placed near them turn by turn. Then ball C must be______________?

   A. positively charged B. electrically neutral C. negatively charged D. positively and negatively charged...

7. If a transistor amplifier draws 2mA when input voltage is 10 V, then its input impedance is ____________?

   A. 20 kΩ B. 2 kΩ C. 10 kΩ D. 5 kΩ...

8. It is generally desired that a transistor should have_____________________ input impedance?

   A. Low B. Very low C. High D. Very high...

9. In transistor amplifiers, we use_____________transformer for impedance matching?

   A. Step up B. Step down C. Same turn ratio None of the above...

10. 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...