A square wire loop is rotating in the magnetic field between two poles of a magnet in order to induce an electric current. The axis of rotation passes through the center of the loop and is midway between the poles, as shown in the side view in Fig. 4.55. How far is the edge of the loop from either pole when the angle between the loop and the vertical is 78.0° if the side of the square is 7.30 cm and the poles are 7.66 cm apart?

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N 178.0° 7.30 cm ? T 17.66 cm S Fig. 4.55