Related Mcqs:

1. 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 %

2. 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

3. 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

4. A constant current signal across a parallel RLC circuits gives an o/p of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ .At the frequency of 4KHZ,the o/p voltage will be___________?

   A. 1 v
   B. 2v
   C. 1.4v
   D. 2.8v

5. 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

6. In a p-n junction diode under reverse bias , the magnitude of electric field is maximum at_____________?

   A. the edge of the depletion region on the p-side
   B. the edge of the depletion region on the n-side
   C. the p-n junction
   D. the center of the depletion region on the n-side

7. An ideal OP-AMP is an ideal___________?

   A. Current controlled Current source
   B. Current controlled voltage source
   C. Voltage controlled voltage source
   D. voltage controlled current source

8. A 741-type OP-AMP has a gain-bandwidth product of 1MHz. A non-inverting amplifier using this op-amp & having a voltage gain of 20db will exhibit -3db bandwidth of__________?

   A. 50 KHz
   B. 100KHz
   C. 1000/17 KHz
   D. 1000/7.07 KHz

9. 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

10. A source follower using an FET usually has a voltage gain which is___________?

    A. greater than +100
    B. slightly less than unity but positive
    C. exactly unity but negative
    D. about -10