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back EMF when switch is open is greater than back EMF when it is on; is that opposes the law of conservation of energy? enter image description here

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closed as unclear what you're asking by The Photon, M. Enns, Jon Custer, ZeroTheHero, Emilio Pisanty Jan 16 at 18:02

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ What switch? In what circuit? If you include a schematic of the circuit you are asking about it will be much more clear what you are asking. $\endgroup$ – The Photon Jan 16 at 16:23
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No, it does not oppose the law of the conservation of energy. In circuits the conservation of energy is more properly represented as conservation of power. Power in a circuit is given by $P=IV$. Voltage by itself is not conserved, so a change in voltage does not indicate a failure of the conservation of energy.

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