A load cell consists of four strain gauges arranged as a four - active - arm Wheatstone bridge as shown in Figure. The gauge factor is 2.0 and resistance is 120 . The Poisson's ratio is 04. The supply voltage is V_in=10V, and the bridge output voltage is amplified by a differential operational amplifier circuit as shown in Figure. The bridge circuit is initially balanced . If the compressive gauges suffer a strain of -2x10^-5, the load cell produces an output voltage of V_out= 5mV ( a ) Determine the strain status in tension or in compression ) of the four strain gauges R_{1 ,} R_{2 ,} R₃, and R₄ ( b ) Assume R₁₁=1k, find R₂₂

In tension compression In tension compression