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Lect_16_note - Chapter 30-1 Sources of the Magnetic Field...

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Chapter 30 -1 Sources of the Magnetic Field
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Magnetic Field of a Wire A compass can be used to detect the magnetic field When there is no current in the wire, there is no field due to the current The compass needles all point toward the Earth’s north pole due to the Earth’s magnetic field
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Magnetic Field of a Wire Here the wire carries a strong current The compass needles deflect in a direction tangent to the circle This shows the direction of the magnetic field produced by the wire
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