CAPE Physics Unit 1 · 2007 (Specimen) · Paper 1 · Question Q14
Which of the following experimental techniques reduces the systematic error of the quantity being investigated?
- (A)Measuring the diameter of a steel rod several times and finding an average.
- (B)Timing a large number of oscillations of a simple pendulum to find a period
- (C)Plotting a series of voltage and current readings for an ohmic device on a graph and using its gradient to find resistance
- (D)Adjusting a voltmeter to remove its zero error before measuring a potential difference.
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