Which of the following statements is CORRECT regarding inductors?
An inductor blocks AC but allows DC to pass.
An inductor blocks DC but allows AC to pass.
An inductors blocks both AC and DC.
An inductor allows both AC and DC to pass.
Detailed Explanation
An inductor resists a change in current that is why it blocks AC. The equation of an inductor is \(\frac{\mathrm{di} }{\mathrm{dt} } = \frac{\mathrm{V} }{\mathrm{L} }\) . If you apply DC across an inductor, it will stabilize to some current flow based on the maximum current available from the current/voltage source. In this mode, the inductor presents very low resistance, so it can be said that it allows DC to pass.
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