The correct answer is C. Faraday’s law of electromagnetic induction.
A DC generator works on the principle of Faraday’s law of electromagnetic induction, which states that an electromotive force (EMF) is induced in a conductor whenever there is a change in the magnetic flux linking the conductor. The magnitude of the EMF is proportional to the rate of change of the magnetic flux.
Lenz’s law states that the direction of the induced current is such that it opposes the change that produces it. Ohm’s law states that the current through a conductor is directly proportional to the voltage across the conductor and inversely proportional to the resistance of the conductor.
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