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Where must a voltmeter be joined to measure the voltage across a resistor?
AIn series with the resistor
BInside the battery itself
CIn place of the resistor
DIn parallel with the resistor
Answer & Solution
Correct answer: D. In parallel with the resistor
1. A voltmeter compares the potential at two points, so it needs to touch both ends of the component.
2. Voltmeters measure potential difference and must be connected in parallel.
3. An ammeter is the instrument that goes in series, because current has to flow through it.
4. Putting a voltmeter in series would break the path the current needs.
_Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 17: Electric circuits_
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