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Digital voltmeters

Digital voltmeters

T355/0179

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Credit

STEVE HORRELL / SCIENCE PHOTO LIBRARY STEVE HORRELL / SCIENCE PHOTO LIBRARY

Caption

Voltmeters. Digital voltmeters used for measuring electricity supplies, in this case alternating currents (A.C.). The voltmeter screen at centre shows the electrical voltage supply in volts (V) and its frequency in cycles per second (hertz, Hz). In the top centre of its screen are figures showing the maximum amplitude of the waves in the A.C. current and its average (mean) value. A generalised A.C. waveform is shown at the top left of the screen. The voltmeter at right shows the average value of an A.C. supply.

Release details

Model release not required. Property release not required.

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