A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit; digital voltmeters give a numerical display of voltage by use of an analog to digital converter.
近义、反义、联想词
近义词
n.
electronic voltmeter
英英词典
digital voltmeter n.
an electronic voltmeter that gives readings in digits