How many turns must be wound on a flat, circular coil of radius 19 cm in order to produce a magnetic field of magnitude 4.4×10−54.4×10−5 T at the center of the coil when the current through it is 0.8 A?

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How many turns must be wound on a flat, circular coil of radius 19 cm in order to produce a magnetic field of magnitude 4.4×10−54.4×10−5 T at the center of the coil when the current through it is 0.8 A?

The required number of turns is__________.

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