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Transformers - working & applications (step up and step down) | A.C. | Physics | Khan Academy
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Quality Factor (AKA: Q) Explained (059)
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All about the quality factor Q in circuits (8 - Passive Filters)
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A better description of resonance
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What is power factor? (Power in AC circuits) | Alternating current | Physics | Khan Academy
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Wrong Place Wrong Time
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