A current is set up in a wire loop consiting of a semicircle of radius4.00 cm, a smaller concentric semicircle, and two radial straight lengths , all in the plane . Figure (a) shows the arrangment but is not drawn to scale. The magnitude of the magnetic field produced at the center of curvature si 74.25 muT . The smaller semicircle is then flipped over (rotated) until the loop is again entirely in the same plane figure (b). The magnetic field produced at the (same) center of curvature now has magnitude 15.75 muT and its direction is reversed from the initial magnetic field. What is the radius of the smaller semicircle?

A current is set up in a wire loop consiting of a semicircle of radius

1.	A current is set up in a wire loop consiting of a semicircle of radius4.00 cm, a smaller concentric semicircle, and two radial straight lengths , all in the plane . Figure (a) shows the arrangment but is not drawn to scale. The magnitude of the magnetic field produced at the center of curvature si 74.25 muT . The smaller semicircle is then flipped over (rotated) until the loop is again entirely in the same plane figure (b). The magnetic field produced at the (same) center of curvature now has magnitude 15.75 muT and its direction is reversed from the initial magnetic field. What is the radius of the smaller semicircle?
Answer» ANSWER :2 CM

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