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Explain why the reactance offered by …

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Explain why the reactance offered by an inductor increases with increase frequency of an alternating voltage

    • Posted by Himanshu Jangra 6 years, 11 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Surabhi Tiwari 6 years, 11 months ago

    An inductor opposes flow of current through it by developing an induced emf according to lenz law .The induced voltage has a polarity so as to maintain the current at its present value.if the current is decreasing, the polarity of the induced emf will be so as to increase the current and vice versa. Since the induced emf is proportional to the rate of change of cuerent, it will provide greater reactance to the flow of current if the rate of change is faster, i.e., if the frequency is higher. The reactance of an inductor , therefore, is proportional to the frequency , being given by wl .

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