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Inductive Reactance, Impedance, & Power Factor - AC Circuits - Physics

AC Circuits Behavior - Inductor and Resistor | Physics with Professor Matt Anderson | M26-02

<p>Will a frequency f = 60 Hz or ω = 75 s&nbsp;<sup>−1</sup> produce a larger max current in an inductor connected to an AC source?</p>

Inductors Explained - The basics how inductors work working principle

AC CIrcuit:  Inductor and Resistor in Series

 An AC circuit consists of an inductor and an emf source with frequency <math display='inline'><mrow><mn>0.25</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">Hz</mi></mrow></math>. If the source is turned on at <math display='inline'><mrow><mi>t</mi><mo>=</mo><mn>0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">s</mi></mrow></math>, and the first time the voltage across the inductor reaches a maximum value is at <math display='inline'><mrow><mi>t</mi><mo>=</mo><mn>1.4</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">s</mi></mrow></math>, when is the first time the current in the inductor is at a maximum? 


A certain laptop charger says that the <math display=“inline”><mrow><msub><mi>V</mi><mrow><mtext>rms</mtext></mrow></msub></mrow></math> provided to the laptop is 12 V. You know this charger is plugged into an outlet for which <math display=“inline”><mrow><msub><mi>V</mi><mrow><mtext>rms</mtext></mrow></msub></mrow></math> is 120 V, such that there must be a transformer inside the laptop charger. If the number of windings of wire on the laptop side of the transformer is 60, how many windings of wire must be on the outlet side of the transformer?


Inductors in AC Circuit (Power)

 The peak current to and from an inductor is i when the emf source has a peak voltage V and frequency f. What is the peak current to and from the inductor if the frequency and peak voltage are doubled to 2f and 2V<math display='inline'><mrow><mn>2</mn><mi mathvariant="normal" class="MathML-Unit">V</mi></mrow></math>, respectively? 


The peak current to and from an inductor is <math display=“inline”><mrow><msub><mi>I</mi><mi mathvariant="normal" class="MathML-Unit">L</mi></msub></mrow></math> when the emf source has a peak voltage <math display=“inline”><mi>V</mi></math> and frequency <math display=“inline”><mi>f</mi></math>. What is the peak current to and from the inductor if the frequency and peak voltage are doubled to <math display=“inline”><mrow><mn>2</mn><mi>f</mi></mrow></math> and <math display=“inline”><mrow><mn>2</mn><mi>V</mi></mrow></math>. respectively?


Inductors Have Inductance, Reactance, AND Impedance.  DANG, DAWG.  | Doc Physics

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