✰ Interpolation: Q.1 The internal generated voltages of 240 V, 100A DC motor with respect to field current at a speed of 1200 rpm are shown in the following tabel. Ifield (A) 0 V (Volts) 0 0.25 110 0.75 235 1 260 1.25 270 275 1.5 Use third order interpolation polynomial method to predict the value of internal generated voltage at field current Ifield 1.15 A. Note: use the best points from the table.