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A 50−Ω50 - \Omega Resistor Is Placed in Series with A 40−mH40 - \mathrm { mH }

Question 63

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A 50−Ω50 - \Omega resistor is placed in series with a 40−mH40 - \mathrm { mH } inductor. At what frequency will the current in this circuit lag the applied voltage by exactly 45∘45 ^ { \circ } ?

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