Which of the following statements is wrong about noise in Operational Amplifiers?

The correct answer is option 4.

Types of Noise in OP-AMP

1.) Thermal Noise

Thermal noise is caused by the thermal agitation of charge carriers (electrons or holes) in a conductor.

This noise is present in all passive resistive elements.

Hence, statement 1 is correct.

2.) Shot noise

Shot noise is a type of electronic noise that originates from the discrete nature of the electric charge.

Shot noise in electronic circuits consists of random fluctuations in a DC current because current actually consists of a flow of discrete charges (electrons). 

Hence, statement 2 is also correct.

3.) Popcorn noise

Burst noise, also called popcorn noise, appears to be related to imperfections in the semiconductor material and heavy ion implants.

Burst noise makes a popping sound at rates below 100 Hz when played through a speaker. 

Hence, statement 3 is also correct.

4.) Flicker noise

It is present in all active devices and generally dominates at low frequencies.

Hence, statement 4 is incorrect.