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Know steps to safely disconnect power and aid victims.
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The AC sine wave shows how voltage rises and falls periodically.
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Circulating currents in the core cause heat and must be minimized.
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AC frequency is cycles per second (Hz), typically 50 or 60 Hz.
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Thin steel layers reduce eddy current loss in transformers.
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RMS values represent equivalent DC power for AC systems.
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Changing current in one coil induces voltage in another.
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The angle between voltage and current affects power delivery.
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Uses a common coil for both primary and secondary circuits.