Which experimental technique reduces the systematic error of the quantity being investigated?
Correct answer: A. Adjusting am ammeter to remove its zero error before measuring a current.
- A. Adjusting am ammeter to remove its zero error before measuring a current.
- B. Measuring several inter modal distance on a standing wave to find the mean inter modal distance
- C. Measuring the diameter of a wire repeatedly and calculating the average.
- D. Timing a large number of oscillation to find a period
Explanation
Systematic error is an error having a non-zero mean, so that its effect is not reduced when observations are averaged. Zero error is an example of systematic error. it cannot be reduced by taking the average rather it is reduced by changing the instrument or changing the procedure.A zero error is a systematic error. So adjusting an ammeter to remove its zero error before measuring a current.
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Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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