Related Mcqs:

1. An OPAMP has a slew rate of 5 V/μ S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is [Hint: Slew rate is defined as the max. rate of change of output voltage. Its unit is V/μS.

   A. 10 volts
   B. 5 volts
   C. 5/1 volts
   D. 5/2 volts

2. In a full-wave rectifier using two ideal diodes,Vdc & Vm are the dc & peak values of the voltage respectively across a resistive load. If PIV is the peak inverse voltage of the diode, then the appropriate relationships for this rectifier is____________?

   A. Vdc = Vm/π, PIV=2Vm
   B. Vdc = 2Vm/π, PIV=2vm
   C. Vdc = 2Vm/π, PIV=Vm
   D. Vdc = Vm/π, PIV=Vm

3. A dc power supply has no-load voltage of 30v,and a full-load voltage of 25v at full-load current of 1A.Its output resistance & load regulation ,respectively are_____________?

   A. 5 Ω & 20 %
   B. 25 Ω & 20 %
   C. 5 Ω & 16.7 %
   D. 25 Ω & 16.7 %

4. The most commonly used amplifier in sample & hold circuits is______________?

   A. A unity gain non-inverting amplifier
   B. A unity gain inverting amplifier
   C. An inverting amplifier with a gain of 10
   D. An inverting amplifiers with a gain of 100

5. In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db &2db respectively, then its common mode rejection ratio is__________?

   A. 23dB
   B. 25dB
   C. 46dB
   D. 50dB

6. Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1KΩ & output resistance of 250 ,are cascaded.The open circuit voltage gain of combined amplifier is_________?

   A. 49dB
   B. 51dB
   C. 98dB
   D. 102dB

7. Class AB operation is often used in power large signal amplifiers in order to_________?

   A. get maximum efficiency
   B. remove even harmonics
   C. overcome a crossover distortion
   D. reducing collector dissipation

8. An amplifier using an opamp with slew rate SR=1v/µsec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed________?

   A. 795mV
   B. 395mV
   C. 795 mV
   D. 39.5mV

9. An amplifier without feedback has a voltage gain of 50,input resistance os 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is___________?

   A. 1/11KΩ
   B. 1/5KΩ
   C. 5KΩ
   D. 11KΩ

10. Voltage Series feedback also called series-shunt feedback) results in__________?

    A. Increase in both input & output impedances
    B. Decreases in both input & output impedances
    C. Increase in input impedance & decreases in output impedance
    D. Decrease in input impedance & increase in output impedance