Operational Amplifiers mcqs

1. **Op-Amp is abbreviation for ________.**

**Operational Amplifier **

Operand amplitude

Operational amplitude

None of the above

2. **Op-Amp is a ______ type of amplifier.**

Current

**Voltage**

Power

Resistance

3. **Op-Amp has ________ inputs.**

Single

Similar

Zero

**Differential**

4. **Op-Amp has ________ outputs.**

**Single**

Similar

Multiple

Differential

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5. **Which of the following are the internal components of an op-amp?**

FET

Transistors

Resistors

**All the above**

6. **Op-Amp has ______ input type configuration.**

**2**

3

4

5

7**. Op-Amp with positive input type configuration is represented as _______.**

+V

-V

V

**Both +V and V**

8. **An ideal Op-amp has _______ input voltage.**

1V

3V

**Grounded**

Infinite

9. **An ideal Op-amp has _______ output voltage.**

1V

3V

Grounded

**Infinite**

10. **Real-time Op-amps are ________ potentials.**

AC

**DC**

Zero

Infinite

11. **CMRR parameter stands for ________.**

**Common mode rejection ratio**

Common medium rejection ratio

Common mode ratio of reference

None of the above

12. **A feedback free instrumentation type amplifier has _____ input impedance.**

**High**

Low

zero

Medium

13. **Ideal Op-amp has _______ open loop gain.**

zero

**Infinite**

Negative

Positive

14. **Ideal Op-amp has ________ input impedance.**

zero

**Infinite**

Negative

Positive

15. **Trans resistance gain in op-amp is the ratio of _________.**

Vin/Iout

Vout/Vin

**Iin/Vout**

Iout/ Iin

16. **Ideal Op-amp has ________ input current.**

**zero**

Infinite

Negative

Positive

** **17**. Ideal Op-amp has ________ bandwidth.**

0

**Infinite**

Negative

Positive

18. **741 Op-amp has _________ number of gain stages.**

2

**3**

4

5

19. **Which of the following are the 3 gain stages in Op-Amp?**

Differential amplifier

Voltage amplifier

Output amplifier

**All the above**

20.** Op-Amps open loop gain ________ when frequency increases.**

Increases

Decreases

**Falls rapidly**

Become zero

** **21.** A real Op-amp has ________ output impedance.**

High

**Low**

zero

Infinity

** **22.** Which factor determine the output voltage of an op-amp?**

Positive saturation

Negative saturation

**Both positive and negative saturation voltage**

Supply voltage

23. **Which of the following are the applications of an op-amp?**

Voltage followers

Selective inversion circuit

Current to voltage converter

**All the above**

24. **Op-Amp 741 IC has _________ number of pins.**

7

**8**

5

6

25. **Open loop op-amp configuration has** ….

**Direct network between output and input terminals**

No connection between output and feedback network

No connection between input and feedback network

All of the mentioned

26. **In which configuration does the op-amp function as a high gain amplifier?**

Differential amplifier

Inverting amplifier

Non-inverting amplifier

**All of the mentioned**

27. **OP-Amp 741 IC third pin specifies ________.**

Offset null

-V

**+V**

-Vcc

28. **A current gain in op-amp is the ratio of _______.**

Vin/Vout

Vout/Vin

**Iin/Iout**

Iout/ Iin

29. **Transconductance gain in op-amp is the ratio of ________.**

**Vin/Iout**

Vout/Vin

Iin/Iout

Iout/ Iin

30. **Generally, an op-amp is a _________ stage amplifier.**

Single

Double

**Multi**

Zero

31. **Op-Amp is available in the form of ________ package.**

**IC**

Kit

Device

All the above

32. **The voltage output of an ideal op-amp is _________.**

**Vout= A _{OL}(V1-V2)**

Vout= (V1-V2)

Vout= A_{OL}

Vout= A_{OL}(V1)

33. **Op-Amp differential input is represented as ________.**

V1+V2

**V1 – V2**

I1+I2

I-V

34. **Op-Amp with positive feedback acts as ________.**

**Oscillator**

Amplifier

Rectifier

Clipper

35. **Op-Amp with negative feedback acts as ________.**

Oscillator

**Amplifier**

Rectifier

Clipper

36. **Which of the following electrical characteristics is not exhibited by an ideal op-amp?**

Infinite voltage gain

Infinite bandwidth

**Infinite output resistance**

Infinite slew rate

37. **How will be the output voltage obtained for an ideal op-amp?**

**Amplifies the difference between the two input voltages**

Amplifies individual voltages input voltages

Amplifies products of two input voltage

None of the mentioned

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