Discussion
True or false: a more expensive instrument is necessarily more accurate.
Answer: D
Correct answer: False, since accuracy depends on calibration and on suitability for the task
Price correlates loosely with quality but guarantees nothing: an expensive instrument out of calibration, or applied where it loads the circuit, gives a worse result than a cheap one used properly. What determines accuracy is a valid calibration, an appropriate range, and a measurement method that does not disturb what it measures.
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