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9. What is the magnitude of the magnetic field at point P if a = R and b = 2R? 3. b. 9 но 16R с. Зної 16R d. с 4R здо 4R
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9. What is the magnitude of the magnetic field at point P if a = R and b = 2R? 3. b. 9 но 16R с. Зної 16R d. с 4R здо 4R
9. What is the magnitude of the magnetic field at point P if a = R and b = 2R? 3. b. 9 но 16R с. Зної 16R d. с 4R здо 4R здо! 8R