Part (A) A strain gauge and bridge arcuit are used to measure the tension force in a bar of steel that has a cross-sectionery. Find the force on the bar. unloaded, the bridge is balanced so the output is O V. Then force is applied to the bar, and the bridge voltage goes to area of 13 cmThe strain gauge has a nominal resistance of 1200 and a GF of 2.8. The bridge is supplied with 10 V. When the bar is (4 Marks) 2 cross-sectional area VO.DOOS V 1200 6000 ID Part (B) if we assume Simple resistance bridge arrangement as shown in the figure below for strain measurement, calculate the change in output voltage, if exciting voltage is 8 V and we have the value of AR/R as per the data given in part (a). (3 Marks) HOH