Direct and alternating current

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Direct and alternating current

Direct and alternating current. An oscilloscope displays the potential difference from an alternating current (AC) source and a direct current (DC) source. The AC source on the right produces the sine wave, whereas the DC source produces a flat, constant, voltage. This has been set to be at the root mean square (RMS) value of the AC source. That is, it is at the value of the average absolute potential difference in the AC circuit. The average power produced by an AC source is the same as that of a DC source of the same current but with voltage at its RMS value

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Media ID 6440431

© ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY

Analogue Analysing Displaying Electrical Electrical Power Electronics Measuring Oscilloscope Potential Difference Table Trace Volt Voltage Volts Wire Wires Physical

EDITORS COMMENTS
This print from Science Photo Library showcases the fascinating world of direct and alternating current. An oscilloscope takes center stage, displaying the potential difference generated by both an AC and DC source. On the right side, we witness a mesmerizing sine wave produced by the AC source, while on the left, a constant flat voltage is emitted by the DC source. The RMS value of the AC source has been meticulously set to match that of its average absolute potential difference in the circuit. It's intriguing to note that despite their differences, both AC and DC sources generate equal average power when carrying identical currents at their respective voltages. This image beautifully captures the essence of electrical technology as it unravels before our eyes. The intricate web of wires connects various components on a table, showcasing how this equipment plays a vital role in measuring and analyzing electrical phenomena. With its blend of analogue charm and technological sophistication, this photograph serves as a reminder of how physics intertwines with everyday life. From volts to root mean square values to sinusoidal waves - all these elements come together harmoniously within this frame. Science Photo Library once again delivers an awe-inspiring visual masterpiece that sparks curiosity about our electrified world.

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