What is a primary application of operational amplifiers?

Operational amplifiers (op-amps) are versatile components widely used in electronics for various applications. The primary application of operational amplifiers encompasses signal amplification, filtering, and performing mathematical operations such as addition, subtraction, integration, and differentiation.

In signal amplification, operational amplifiers can amplify weak signals to levels that are suitable for further processing or to be converted into a digital signal. They can be configured in different ways, such as inverting or non-inverting amplifiers, to achieve the desired gain.

Filtering is another significant application where op-amps are used to design active filters, which can selectively amplify or attenuate certain frequency components of a signal, thereby enabling the isolation of desirable signals from noise.

Moreover, op-amps facilitate mathematical operations, which is inherent in their design and functionality. By interconnecting op-amps with resistive networks, they can carry out complex calculations essential in analog computations.

This collective capability to both amplify and perform mathematical operations is fundamental to many analog signal processing applications, making it the primary reason for their extensive use in electronic circuits. Other applications mentioned, such as inductive filtering, resistance checking, or creating oscillations, while they can be associated with electronics, do not capture the fundamental versatility and core applications