Question 200Electricity & Electronics - Assistant Engineer

The correct answer is A) the increasing current produces a voltage in opposition to the applied voltage. When the direct current flowing through an electrical coil is increasing, the changing magnetic field inside the coil induces a voltage that opposes the change in current, as described by Lenz's law. This induced voltage, known as a back EMF (electromotive force), acts in opposition to the applied voltage, reducing the effective voltage across the coil. This is a fundamental principle of electromagnetic induction and is a key characteristic of the behavior of electrical coils with changing current. The other answer choices are incorrect because: B) the increasing current would actually increase the power consumed, not reduce it; C) the increasing current would increase the amount of flux produced, not reduce it; and D) the increasing current would change the coil's impedance, but this is not the primary effect described in the question.