All Exams Test series for 1 year @ ₹349 only
Question

In an Op-Amp inverting amplifier, the pin 2 of 741 IC is at virtual ground. This statement is based on which law?

This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is

Kirchhoff’s Voltage Law

Op-amp :

This IC is Dual Inline Package and it is represented as 741 IC.

The pin diagram is shown below:

Pin 2 and 3 are input terminals.

Inverting terminal :

If we apply the input at this terminal the output will have a 180° phase shift.

Non-inverting terminal :

If we apply the input at this terminal the output will not have any phase shift at the output.

Kirchhoff’s Voltage law :

This law states that the algebraic sum of all voltages in a closed loop will be zero.

\(\sum {V_{loop}} = 0\)

Virtual ground :

Both the terminal voltages will be equal for an op-amp.

Here we are discussing the voltage and in a loop, it will be zero.

V 1= V 2

V 1– V 2= 0

KVL is satisfied here
Was this answer helpful?

Similar Questions

  1. The Schmitt trigger circuit is a modification of which of the following multivibrators?

  2. The Common Mode Rejection Ratio (CMRR) of an ideal OP-Amp is ________.

  3. In an op-amp, the input impedance is _______ and the output impedance is _______.

  4. If a capacitor is placed in the feedback path of an op-amp circuit, then the circuit can act as

  5. In an operational amplifier integrator circuit, which component acts as feedback between the output and the input?
  6. Which operational amplifier configuration is commonly used in zero crossing detectors?

  7. If the input resistor of an inverting amplifier using OP-AMP is doubled and the feedback resistor remains the same, what happens to the magnitude of voltage gain?

  8. To convert an op-amp integrator into a practical integrator (avoiding low-frequency saturation), which component is typically added in parallel with the feedback capacitor?

  9. When analyzing a closed-loop circuit containing an ideal operational amplifier, what assumption must be applied regarding the currents entering the inverting and non-inverting input pins?

  10. What happens to the gain of a non-inverting amplifier using OP-AMP if the feedback resistor value is increased by 5 % while keeping the input resistor constant? (Assuming the OP-AMP remains in linear range for operation.)


Important Questions from Operational Amplifiers

  1. An oscillator circuit which is meant for converting sine wave signal into square wave signal is called a

  2. Which one of the following options is true for an ideal Op-amp?

  3. The maximum rate that an output of an operational amplifier can change

  4. CMRR for an Op-amp should be

  5. In order for an output to swing above and below a zero reference, the op-amp circuit requires-

Need Expert Advice?
Upcoming Exams
RRB NTPC
September 27, 2026
Test Series
RRB ALP img
Railways
RRB ALP 2026 Mock Test series
1035 Tests 1 Tests Free
893 Attempts
4.3(235)
English, Hindi

Start Your Preparation with Prepp Mobile App

Download the app from Google Play & App Store
Download the app from Google Play & App Store
Prepp Mobile App