Question

It is a device to change a signal which is in one physical form to a corresponding signal in another physical form.

(a) amplification

(b) transducer

(c) feed back

(d) none of the mentioned

I had been asked this question in an interview.

Query is from Automatic Control topic in section Automatic Control of Machine Dynamics

Answer 1

Correct option is (b) transducer

Easiest explanation: Increasing the amplitude of the signal without affecting its waveform is known as amplification. The device to change a signal which is in one physical form to a corresponding signal in another physical form is known as transducer.