How many turns must be wound on a flat, circular coil of radius 20 cm in order to produce a magnetic field of magnitude 4.0 × 10-5 T at the center of the coil when the current through it is 0.85 A?
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![How many turns must be wound on a flat,
circular coil of radius 20 cm in order to produce a
magnetic field of magnitude 4.0 x 10-5 T at the
center of the coil when the current through it is
0.85 A?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6123bd4b-f483-495c-88a9-ba094fe0819b%2Fdb5906e4-7fc3-4640-820f-0f4205400680%2Fqwphzms_processed.jpeg&w=3840&q=75)
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