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Compensation for temperature variation in the leads can be provided by using ________ lead method.

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Compensation for temperature variation in the leads can be provided by using ________ lead method.

(a) six

(b) four

(c) three

(d) two

This question was posed to me in an interview for internship.

My query is from Pressure Transducers in division Physiological Transducers of Biomedical Instrumentation

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The correct option is (c) three

The best I can explain: Compensation for temperature variation in the leads can be provided by using three  lead method. In this method two of the leads are in the adjacent legs of the bridge which cancels their resistance changes and does not disturb the bridge balance. The third lead is in series with the power supply and is therefore independent of bridge balance.

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