Operational Amplifier And 555 Timer A2 And A4

10 Questions | By Pratikshapatil21 | Updated: Feb 4, 2019 | Attempts: 111

Questions

Settings

Create your own Quiz

Operational Amplifier And 555 Timer A2 And A4 - Quiz

Questions and Answers

1.

Pick all incorrect statements. Ideal characteristics of Op-Amp are A. Open loop gain is infinite. B. Output Impedance is infinite. C. Input Impedance is Zero. D. Input Offset current is the algebraic difference between input currents.
- A.
  
  A, B and D
- B.
  
  B, C and D
- C.
  
  B and C
- D.
  
  B and D
2.

Find the gain of the inverting amplifier shown below. Consider R1 = 40kΩ and RF = 400kΩ Assume op-amp is ideal.
- A.
  
  -10
- B.
  
  10
- C.
  
  -11
- D.
  
  Option 4
3.

Open loop gain of an operational amplifier is
- A.
  
  2*10^5
- B.
  
  1
- C.
  
  0
- D.
  
  Infinite
4.

In the open loop configuration of OP-AMP _____________ feedback is used
- A.
  
  Positive
- B.
  
  No
- C.
  
  Negative
- D.
  
  Series
5.

In given circuit Vin = 4 V, R1 = 1KΩ and R2 = 10KΩ.What is the output voltage of an amplifier
- A.
  
  11
- B.
  
  -44
- C.
  
  44
- D.
  
  -11
6.

For first order butterworth low pass filter, calculate cut off frequency if R=10kΩ and C = 0.001. Also calculate Avf if Rf = 100K Ω and R1 = 10kΩ.
- A.
  
  15915 Hz,-11
- B.
  
  15.915KHz,-11
- C.
  
  15.915KHz,11
- D.
  
  15.915MHz,-11
7.

Output produce by an op-amp is in phase when input is applied to
- A.
  
  Inverting terminal
- B.
  
  Non Inverting terminal
- C.
  
  Both inverting and non-inverting terminals
- D.
  
  Common mode
8.

Determine closed loop voltage gain of an non inverting amplifier if feedback resistor is double times input resistor
- A.
  
  3
- B.
  
  6
- C.
  
  4
- D.
  
  -3
9.

Inverting configuration adder can be used as
- A.
  
  Summing amplifier
- B.
  
  Averaging amplifer
- C.
  
  Scaling amplifier
- D.
  
  All of three