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Figure (a) shows two concentric circular regions in which uniform magnetic fields can change. Region 1, with radius r-4.2 cm, has an outward B 1magnetic field that is increasing in magnitude. Region 2, with radius r2 =8.4 cm, has an outward magnetic field B 2 that may also be changing. Imagine that a conducting ring of radius Ris centered on the two regions and then the ermnf g around the ring is determined. Figure (b) gives emf g as a function of the square R? of the ring's radius, to the outer edge of region 2. The vertical axis scale is set by 8, = 26 nV. What are the rates (a) dB1/dt and (b) dB2/dt? (c) lIs the magnitude of B 2 increasing, decreasing, or renaining constant? T2 (a) 8, (b) R (cm³) (a) Number Units (b) Number Units 8 (nV)

Figure (a) shows two concentric circular regions in which uniform magnetic fields can change. Region 1, with radius r-4.2 cm, has an outward B 1magnetic field that is increasing in magnitude. Region 2, with radius r2 =8.4 cm, has an outward magnetic field B 2 that may also be changing. Imagine that a conducting ring of radius Ris centered on the two regions and then the ermnf g around the ring is determined. Figure (b) gives emf g as a function of the square R? of the ring's radius, to the outer edge of region 2. The vertical axis scale is set by 8, = 26 nV. What are the rates (a) dB1/dt and (b) dB2/dt? (c) lIs the magnitude of B 2 increasing, decreasing, or renaining constant? T2 (a) 8, (b) R (cm³) (a) Number Units (b) Number Units 8 (nV)

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Figure (a) shows two concentric circular regions in which uniform magnetic fields can change. Region 1, with radius r=4.2 cm, has an outward B 1 magnetic field that is increasing in magnitude. Region 2, with radius r2 = 8.4 cm, has an outward magnetic field B 2 that may also be changing. Imagine that a conducting ring of radius Ris centered on the two regions and then the ernf g around the ring is determined. Figure (b) gives emf g as a function of the square R? of the ring's radius, to the outer edge of region 2. The vertical axis scale is set by 8, = 26 nV. What are the rates (a) dB1/dt and (b) dB2/df? (c) lIs the magnitude of B 2 increasing, decreasing, or renaining constant? T2 (a) (b) R (cm³) (a) Number Units (b) Number i Units (Au) %
Transcribed Image Text:Figure (a) shows two concentric circular regions in which uniform magnetic fields can change. Region 1, with radius r=4.2 cm, has an outward B 1 magnetic field that is increasing in magnitude. Region 2, with radius r2 = 8.4 cm, has an outward magnetic field B 2 that may also be changing. Imagine that a conducting ring of radius Ris centered on the two regions and then the ernf g around the ring is determined. Figure (b) gives emf g as a function of the square R? of the ring's radius, to the outer edge of region 2. The vertical axis scale is set by 8, = 26 nV. What are the rates (a) dB1/dt and (b) dB2/df? (c) lIs the magnitude of B 2 increasing, decreasing, or renaining constant? T2 (a) (b) R (cm³) (a) Number Units (b) Number i Units (Au) %
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