What is the device used to measure a potential difference in a circuit called?
a. ammeter
b. potentiometer
c. voltmeter
d. galvonmeter
e. batterymeter

Respuesta :

A voltmeter is the instrument used to measure a potential difference between two points in an electric circuit
AL2006
The potential difference between two points in a circuit is
sometimes called the 'voltage' because its unit of measure
is the volt.  This is a big part of the reason why a voltmeter
is the device that's used to measure it.