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The galvanometer resistance is 79Ω. The strain gauge
resistance 2 = 3 = 128Ω and 1 = 103Ω at zero
strain and resistor 4 is adjusted to balance the bridge
at zero-strain conditions. The gauge factor (Sg) is 2.65.
Calculate the output voltage when the strain is 422 x
10-6. Take battery voltage as 10.2 V