will use. The table (below) gives the field as a function of current. Symmetry requires that applying any current or its negative should yield the same magnitude of field. Thus, only odd powers can appear in the behavior. Fit these data to obtain the linear and cubic terms. Specifically, determine A and C in: B(1) = A I + C 13. Use your fit parameters to obtain the field for a given current. I (A) B (mT) 106 2 208 3 312 4 407 5 511 607 704 CO 784 The current in the electromagnet is set to 1.68 amps. The field from this current is B= mT