Curves A and B shown in Fig. 1 are the input-output characteristics of a force sensor when the force is increased from 0 to 1 N (curve A) and when the force is decreased from 1 N to 0 (Curve B). Straight line approximation of curve A is given by A'. Output (mV) 7.5 7.3 7.1 6.9 6.7 6.5 6.3 6.1 5.9 5.7 5.5 5.3 5.1 4.9 4.7 4.5 0 L A V V 0.1 0.2 B 0.3 0.4 A 0.2 N A 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 Input (N) Fig. 1 Choose the correct answer i) The linearity (nonlinearity) error of the sensor when the force is increasing is approximately (3 marks) 0.2 mV 0.28 mV 0.28 N