An electrical instrument that is used to measure the potential difference between two points is called:
Correct answer: D. Voltmeter
- A. Barometer
- B. Manometer
- C. Galvanometer
- D. Voltmeter
Explanation
A voltmeter is an instrument used for measuring the electrical potential difference between two points in an electric circuit. The voltmeter has a very high resistance and is connected in parallel to the electrical component whose potential difference is to be measured.
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Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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