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A bridge circuit uses which method of measurement?

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A bridge circuit uses which method of measurement?

(a) absolute

(b) relative

(c) differential

(d) comparison

This question was posed to me in an online quiz.

Query is from Introduction of Bridges in chapter Measurement of Resistance of Electrical Measurements

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The correct choice is (d) comparison

To explain I would say: A bridge circuit makes use of a comparison measurement method. In this method the bridge compares the value of an unknown component with a standard value of a given component.

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