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Lenz’s law is a consequence of the law of conservation of :

  • A.Charge
  • B.Mass
  • C.Momentum
  • D.Energy

Answer: D

Lenz's law is a consequence of the conservation of energy.

Lenz's law says that the induced current flows in a direction that opposes the change producing it. When a magnet is pushed into a coil, the induced current makes the coil repel the magnet, so work has to be done to move it, and that work appears as electrical energy. If the induced current aided the change, energy would be created from nothing.

Conservation of charge, mass or momentum does not explain the direction of the induced current.

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