In practice, voltage gain is expressed______________?

Related Mcqs:

1. A series resonant band-stop filter consists of a 68 Ω resistor, a 110 mH coil, and a 0.02 µF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?

   A. 1.1 mV
   B. 11.1 mV
   C. 111 mV
   D. 200 mV

2. A series resonant band-pass filter consists of a 2 mH coil, a 0.005 µF capacitor, and a 120 Ω resistor. The winding resistance of the coil is 12 Ω. The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)?

   A. 10.9 V
   B. 1.09 V
   C. 1.1 V
   D. 12 V

3. An amplifier has a power gain of 100. Its db gain is ________________?

   A. 10 db
   B. 20 db
   C. 40 db
   D. None of the above

4. 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

5. _____________coupling provides the maximum voltage gain?

   A. RC
   B. Transformer
   C. Direct
   D. Impedance

6. A gain of 1000 times in voltage is expressed by_______________?

   A. 60 db
   B. 30 db
   C. 120 db
   D. 600 db

7. If the power and current gains of a transistor amplifier are 16500 and 100 respectively, then voltage gain is_____________________?

   A. 165
   B. 165 x 104
   C. 100
   D. None of the above

8. In a CE amplifier, voltage gain =____________________ x RAC/Rin?

   A. α
   B. (1 + α)
   C. (1+ β)
   D. β

9. In order to get more voltage gain from a transistor amplifier, the transistor used should have_________________?

   A. Thin base
   B. Thin collector
   C. Wide emitter
   D. None of the above

10. If a transistor amplifier feeds a load of low resistance (e.g. speaker), then voltage gain will be_______________?

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