Kognity IB Physics A.0 Measurements & Uncertainty (id: 92f2eca62)

[单选题]
By averaging three ms / w8bh0yuec xmr54:heasurements of the same qurfb2)mg.ug7 h antity which of the following can be re.2g )ufm7bghrduced?

A. Random errors
B. Systematic errors
C. Random & systematic errors
D. Zero errors


参考答案:  A


本题详细解析:
Systematic errors arise due to faulty instrumentatcfe, ee1f/*9 2stjn2 vvs bmj3s( tv5bion or consistently bad technique. Averaging repeated measurements will not change a systematic bias. So B & C are incorrect. Zero errors are examples of systematic errors, where a the zero of an instrument is not correcb2 9be( tvetf/,vn ms5j2 13fvjsce*stly calibrated. So D is incorrect. Random errors will be sometimes too high and at other times too low – so averaging them will have the effect of reducing the random error. Hence A is correct.