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Lenz's law explains the direction of the current in the coil of wire in Figure 10.In either case-moving the magnet toward or away from the coil-an induced magnetic field opposes the change in the field that created it. A decreasing magnetic field induces a field to oppose the decrease, an increasing magnetic field induces a field to oppose the increaseThe current produced by the induced EMF must be in the direction shown in Figure 10 to produce a magnetic field that opposes the increase in field.The induced field exerts a repelling force on the approaching magnet.
Lenz's law explains the direction of the current in the coil of wire in Figure 10. The approaching magnet causes an increase in the magnetic field inside the coil. The current produced by the induced EMF must be in the direction shown in Figure 10 to produce a magnetic field that opposes the increase in field. The induced field exerts a repelling force on the approaching magnet. By Newton's third law, there must be an equal and opposite force on the coil. This force pushes the coil away from the magnet. If you moved the magnet away from the coil, the field within the coil would decrease. By Lenz's law, the induced field would oppose this change by being in the same direction as the field of the magnet and adding to the field. In this case, the Current producing the induced field in the coil would be in the clockwise direction.
In either case-moving the magnet toward or away from the coil-an induced magnetic field opposes the change in the field that created it. A decreasing magnetic field induces a field to oppose the decrease, an increasing magnetic field induces a field to oppose the increase
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