A torus with 20 turns, carrying a current , has a magnetic field strength B at its center If the number of turns around the torus were suddenly increased to 60, and the current cut in half to , what is the new magnetic field at the center of the torus

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A torus with 20 turns, carrying a current , has a magnetic field strength B at its center  If the number of turns around the torus were suddenly increased to 60, and the current cut in half to , what is the new magnetic field at the center of the torus

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Question: A torus with 20 turns, carrying a current , has a magnetic field strength B at its center. If the number of turns around the

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