A tuning fork of frequency 400 Hz is moved away from an observer and toward a flat wall with a speed of 2mps. What is the apparent frequency of the unreflected sound waves coming directly to the observer? Assume the speed of the sound in air to be 340 mps. * 398 Hz

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A:

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Operational Amplifier

An operational amplifier also called op amp is an integrated circuit or analog circuit that takes input as a differential voltage and produces output as a single-ended voltage. It is an IC that can amplify weak electric signals.An op amp has one output pin and two input pins. The basic role of an opamp is to amplify the voltage difference between the two input voltages. It is also used in filtering or to perform mathematical operations or in signal conditioning.