1 db corresponds to_____________change in voltage or current level?

Related Mcqs:

1. 1 db corresponds to_____________change in power level?

   A. 50%
   B. 35%
   C. 26%
   D. 22%

2. 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

3. 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

4. In a certain low-pass filter, fc = 3.5 kHz.if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?

   A. 0 V
   B. 5.97 V
   C. 6 V
   D. 597 mV

5. In a certain low-pass filter, fc = 3.5 kHz. If the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?

   A. 0 V
   B. 5.97 V
   C. 6 V
   D. 597 mV

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. Two 3.3 kΩ resistors are in series and this series combination is in parallel with a 4.7 kΩ resistor. The voltage across one of the 3.3 kΩ resistors is 12 V. The voltage across the 4.7 kΩ resistor is_________?

   A. 24 V
   B. 12 V
   C. 0 V
   D. 6 V

8. A voltage divider consists of two 100 kΩ resistors and a 12 V source. What will the output voltage be if a load resistor of 1 MΩ is connected to the output?

   A. 0.57 V
   B. 6 V
   C. 12 V
   D. 5.7 V

9. A sinusoidal voltage with a peak-to-peak value of 18 V is applied to an RC low-pass filter. If the reactance at the input frequency is zero, the output voltage is____________?

   A. 18 V peak-to-peak
   B. zero
   C. 9 V peak-to-peak
   D. 12.74 V peak-to-peak

10. The out put voltage of a transformer is 3 times the input voltage then turns ratio will be________________?

    A. 3-Jan
    B. 3
    C. 1
    D. 6