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Output of the comparator is known as ________

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Output of the comparator is known as ________

(a) amplified signal

(b) error signal

(c) feedback signal

(d) attenuated signal

This question was addressed to me in exam.

The origin of the question is Potentiometric Integrating Type DVM topic in division Electronic Instruments of Electrical Measurements

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Correct choice is (b) error signal

To explain: Comparator then provides the difference between the feedback voltage and the unknown voltage as its output. This is also known as the error signal.

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