which of the following device would you use to maintain potential difference between two points of a conductor? and why? ...... plz fast ... urgent..........
a. A Rheosat b. A cell c. A voltmeter d. An ammeter
source of electricity such as cell, battery, power supply, etc. helps to maintain a potential difference across a conductor.A voltmeter is an instrument used for measuring the electrical potential difference between two points in an electric circuit.
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