Which of the following laws is based upon the law of conservation of energy?
Correct answer: C. Lenz's law
- A. Faraday's law
- B. Coulomb's law
- C. Lenz's law
- D. Ohm's law
Explanation
Lenz's law is based on the law of conservation of energy. It states that the induced electromotive force (EMF) will generate a current that creates a magnetic field opposing the change in magnetic flux. This opposition prevents an endless increase of energy, thereby conserving energy.Faraday's law describes how a time-varying magnetic field induces an EMF but does not inherently encompass the concept of energy conservation. Coulomb's law pertains to electrostatics, and Ohm's law is a basic principle for electrical circuits, neither of which directly involve conservation of energy in the context of electromagnetic induction.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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