voltmeter
Americannoun
noun
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An instrument used for measuring the difference in voltage between two points in an electric circuit. Voltmeters typically make use of an ammeter that measures current flow across a known resistance inside the voltmeter; direct-current voltages can then be determined by Ohm's law. Digital voltmeters employ A/D converters to provide the numerical value of the voltage displayed.
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Compare ohmmeter
Etymology
Origin of voltmeter
Vocabulary lists containing voltmeter
Electrical Engineering
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Engineering - Middle School
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Engineering - High School
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A voltmeter in the external circuit allows measurement of the potential difference between the two half-cells.
From Textbooks ● Feb. 14, 2019
Suppose you measure the terminal voltage of a 1.585-V alkaline cell having an internal resistance of 0.100 Ω by placing a 1.00-k Ω voltmeter across its terminals.
From Textbooks ● Aug. 12, 2015
The voltage across the device is not the same as when the voltmeter is out of the circuit.
From Textbooks ● Aug. 12, 2015
The uncertainty in this calculation can be considerably smaller than when using a voltmeter directly, but it is not zero.
From Textbooks ● Aug. 12, 2015
If they are not, open them and see if the voltmeter pointer returns to the "0" line.
From The Automobile Storage Battery Its Care And Repair by Otto A. Witte
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
