Because the output of a Wheatstone bridge is a small dc voltage with a large common-mode voltage,what type of amp must be used?
A) dc with a very high CMRR
B) ac with a very high CMRR
C) a power amp
D) a voltage follower

Question

Quizplus · Accepted Answer

The best choice is an amplifier with a very high Common-Mode Rejection Ratio (CMRR) as it will reject the common-mode voltage and amplify only the differential voltage. A dc amplifier will be suitable as the output of the Wheatstone bridge is a small dc voltage.

Because the Output of a Wheatstone Bridge Is a Small