The strength of a circular magnetic field decreases with increasing radius as shown. a. What is B-ds? Explain or show your work. b. What is B-ds? c. What is B-ds? 1 d. Combining your answers to parts a to c, what is 8T Explain or show your work. 6 T Explain or show your work. SB-ds? -1 cm 4T 2T

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