Ideal Operational Amplifier MCQ’s

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This set of Linear Integrated Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Ideal Operational Amplifier”.

1. Determine the output from the following circuit

Determine the output Vo from the given circuit

a) 180o in phase with input signal
b) 180o out of phase with input signal
c) Same as that of input signal
d) Output signal cannot be determined

2. An ideal op-amp requires infinite bandwidth because
a) Signals can be amplified without attenuation
b) Output common-mode noise voltage is zero
c) Output voltage occurs simultaneously with input voltage changes
d) Output can drive infinite number of device

3. Ideal op-amp has infinite voltage gain because
a) To control the output voltage
b) To obtain finite output voltage
c) To receive zero noise output voltage
d) None of the mentioned

4. Which of the following electrical characteristics is not exhibited by an ideal op-amp?
a) Infinite voltage gain
b) Infinite bandwidth
c) Infinite output resistance
d) Infinite slew rate

5. Find the output voltage of an ideal op-amp. If V1 and V2 are the two input voltages
a) VO= V1-V2
b) VO= A×(V1-V2)
c) VO= A×(V1+V2)
d) VO= V1×V2

6. Determine the output voltage from the following circuit diagram?

Determine the output voltage from the given circuit diagram

a) 

Out-phase waveform with input signal

b)

Neither a in-phase nor a out-phase waveform with input signal

c) 

In-phase waveform with input signal

d) None of the mentioned

7. The signal to an inverting terminal of an ideal op-amp is zero. Find the output voltage, if the other input voltage is

Find the output voltage for the given circuit
Out-phase waveform with input signal between +2.5v to -2.5v

a) 

Out-phase waveform with input signal between +5v to -5v


b) 

Out-phase waveform with input signal between +6.25v to -6.25v

c) 
d) Data provided is insufficient

8. How will be the output voltage obtained for an ideal op-amp?
a) Amplifies the difference between the two input voltages
b) Amplifies individual voltages input voltages
c) Amplifies products of two input voltage
d) None of the mentioned

9. Which is not the ideal characteristic of an op-amp?
a) Input Resistance –> 0
b) Output impedance –> 0
c) Bandwidth –> ∞
d) Open loop voltage gain –> ∞

10. Which factor determine the output voltage of an op-amp?
a) Positive saturation
b) Negative saturation
c) Both positive and negative saturation voltage
d) Supply voltage

11. Find the ideal voltage transfer curve of a normal op-amp.

Voltage transfer curve with less saturation value

a)

Voltage transfer curve with very large saturation value

 b) 

Ideal voltage transfer curve of a normal op-amp

c) 

Voltage transfer curve with large saturation value

d) 

12. Find the input voltage of an ideal op-amp. It’s one of the inputs and output voltages are 2v and 12v. (Gain=3)
a) 8v
b) 4v
c) -4v
d) -2v

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