page_title: AC power
hierarchical_section_title: AC power
caption_attribution_description: English: The 60 Hz blinking of non-incandescent city lights of Prince George, British Columbia (Canada), motion-blurred by waving the camera during the exposure. The AC nature of the mains power is revealed by the dashed appearance of the traces of moving lights.
context_page_description: Power in an electric circuit is the rate of flow of energy past a given point of the circuit. In alternating current circuits, energy storage elements such as inductors and capacitors may result in periodic reversals of the direction of energy flow.
  The portion of power that, averaged over a complete cycle of the AC waveform, results in net transfer of energy in one direction is known as active power. The portion of power due to stored energy, which returns to the source in each cycle, is known as reactive power.
context_section_description: Power in an electric circuit is the rate of flow of energy past a given point of the circuit. In alternating current circuits, energy storage elements such as inductors and capacitors may result in periodic reversals of the direction of energy flow.
  The portion of power that, averaged over a complete cycle of the AC waveform, results in net transfer of energy in one direction is known as active power (more commonly called real power to avoid ambiguity especially in discussions of loads with non-sinusoidal currents). The portion of power due to stored energy, which returns to the source in each cycle, is known as reactive power.
caption: The blinking of non-incandescent city lights is shown in this motion-blurred long exposure. The AC nature of the mains power is revealed by the dashed appearance of the traces of moving lights.
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