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http://www.edisontc.org/ui/files/2016/02/Unit1Banner900-1a.jpg800254The voltmeter is a key instrument in our world of electrical technology. They are used in everything from x-ray machines to radio transmission, computers to power utility and atmospheric science measurement to the Hubble Telescope. Voltmeters can use magnetic fields, electrostatic fields, and plasma phenomena to measure voltage. In this page we talk about PMMC … Continue reading