Question: A strain gauge with GF = 2 . 2 5 and RA = 4 0 0 Q is used in the bridge in Figure Q

A strain gauge with GF =2.25 and RA =400Q is used in the bridge in Figure Q1(b). The bridge resistors are Ri = R2=400O and the dummy gauge has RD =400Q. The voltage Vsis10V. i) If a strain of 2500/ym/m is applied, find the bridge offset voltage, ii) RD is now set to a new value of 450O, what is the value of strain need to be applied to balance the circuit.

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