Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is__________?

Related Mcqs:

1. A balanced Wheatstone bridge consists of an RV of 3,500 Ω, an R2 of 200 Ω, and an R3 of 680 Ω. The value of RUNK is____________?

   A. 680 Ω
   B. 1,029 Ω
   C. 200 Ω
   D. 880 Ω

2. The size of an excavator is usually expressed in terms of_________________?

   A. ‘crowd’ motion
   B. angle of swing
   C. cubic metres
   D. travel in metres

3. The capacity of a crane is expressed in terms of_______________?

   A. type of drive
   B. span
   C. tonnes
   D. any of the above

4. The noise factor of an ideal amplifier expressed in db is_____________?

   A. 0
   B. 1
   C. 1
   D. 10

5. The gain of an amplifier is expressed in db because_____________?

   A. It is a simple unit
   B. Calculations become easy
   C. Human ear response is logarithmic
   D. None of the above

6. A gain of 1,000,000 times in power is expressed by_____________?

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

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

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

8. The parallel combination of a 470 Ω resistor and a 1.5 kΩ resistor is in series with the parallel combination of five 1 kΩ resistors. The source voltage is 50 V. The percentage of the load current through any single 1 KΩ resistor is__________?

   A. 25 %
   B. 20 %
   C. 100 %
   D. 50 %

9. At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V. The voltage ratio in decibels is_____________?

   A. 6.02 dB
   B. -6.02 dB
   C. 12.04 dB
   D. -12.04 dB

10. 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