MCQ practice · SSC Physics Board questions · Chapter 11: Current Electricity
What is the name of the instrument that measures the potential difference?
Think it through first, then pick an option.
- a Galvanometer
- b Generator
- c Ammeter
- d Voltmeter
Answer and explanation
Correct answer: d Voltmeter
The instrument for measuring potential difference is the voltmeter.
Why the other options are wrong
- a Galvanometer: A galvanometer detects whether current flows in a circuit; the potential difference is measured by a voltmeter.
- b Generator: A generator produces a potential difference, it does not measure it; the voltmeter does.
- c Ammeter: An ammeter measures the current; the potential is measured by a voltmeter.
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