When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle

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Without magnetism, electrical and electronic components such as relays, solenoids, inductors, chokes, coils, loudspeakers, motors, generators, transformers, and electricity meters etc, would not work.


When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle