Question#7 A col with a magnetic moment of 1.45 A - mm is oriented initially with its magnetic moment antiparallel to a uniform magnetic field of magnitude O.B4ST. Part A What is the change in potential energy of the coil when it is rotated 180 * so that its magnetic moment is perallel to the field? ANSWER Question#8 A circular loop of wire with area A lies in the xy plane. As viewed along the r-axis looking in the - I-direction toward the origin a current I is circulating clockwise around the loop. The torque produced by an external magnetic field B is given by ? = D (41 - 4) ). where Dlis a positive constant, and for this orientation of the loop the magnetic potential energy D's - # . his negative The mightuse of the magnetic held is Bo = 130/14. Pari A Butarming the vector magnetic moment of the comment loop Express your an in terms of the verichies [A, 1. ). mak. ANSWER Part B Defarming the component 8, of A. Express your answer using one significant figure. Part O Derfarming the component Il, of Expresi your answer using one significant Figure. ANSWER - DIA Part D Deterring the component It, off Express your answer using twe significant figures ANSWER - DILA