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26 O In Fig. 29-54a, wire 1 consists of a circular arc and two radial lengths; it carries current = 0.50 A in the direction indicated. Wire 2, shown in cross section, is long, straight, and per- pendicular to the plane of the figure. Its distance from the center of the arc is equal to the radius R of the arc, and it carries a current iz that can be varied. The two currents set up a net magnetic field B at the center of the arc. Figure 29-54b gives the square of the field's magnitude B plotted versus the square of the current iB. The verti- cal scale is set by B; = 10.0 x 10-10 T?. What angle is subtended by the arc? B? (A) (a) (b) (L. 01-01) A

26 O In Fig. 29-54a, wire 1 consists of a circular arc and two radial lengths; it carries current = 0.50 A in the direction indicated. Wire 2, shown in cross section, is long, straight, and per- pendicular to the plane of the figure. Its distance from the center of the arc is equal to the radius R of the arc, and it carries a current iz that can be varied. The two currents set up a net magnetic field B at the center of the arc. Figure 29-54b gives the square of the field's magnitude B plotted versus the square of the current iB. The verti- cal scale is set by B; = 10.0 x 10-10 T?. What angle is subtended by the arc? B? (A) (a) (b) (L. 01-01) A

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26 O In Fig. 29-54a, wire 1 consists of a circular arc and two radial lengths; it carries current = 0.50 A in the direction indicated. Wire 2, shown in cross section, is long, straight, and per- pendicular to the plane of the figure. Its distance from the center of the arc is equal to the radius R of the arc, and it carries a current iz that can be varied. The two currents set up a net magnetic field B at the center of the arc. Figure 29-54b gives the square of the field's magnitude B plotted versus the square of the current iB. The verti- cal scale is set by B; = 10.0 x 10-10 T?. What angle is subtended by the arc? B? (A) (a) (b) (L. 01-01) A
Transcribed Image Text:26 O In Fig. 29-54a, wire 1 consists of a circular arc and two radial lengths; it carries current = 0.50 A in the direction indicated. Wire 2, shown in cross section, is long, straight, and per- pendicular to the plane of the figure. Its distance from the center of the arc is equal to the radius R of the arc, and it carries a current iz that can be varied. The two currents set up a net magnetic field B at the center of the arc. Figure 29-54b gives the square of the field's magnitude B plotted versus the square of the current iB. The verti- cal scale is set by B; = 10.0 x 10-10 T?. What angle is subtended by the arc? B? (A) (a) (b) (L. 01-01) A
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