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

[单选题]
By averaging three measurements of the same quabdivkkfk odxe81 . 7hf8j;t7(ntity which of t0ggbioy3x1*2(s f2wq s 5bul jhe following can be reduced? 0bq fg(ijg*ub3 1lxo5y2ws s2

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 instrumentation or consistentlz lb jio p/t9d4aem:a 6/,7ruy9 xk1mmy bad technique. Averaging repeated measurements will not change a systematic bias. So B & C are incorm zao ,lma7 1jx496it yp/me k:rbdu9/rect. Zero errors are examples of systematic errors, where a the zero of an instrument is not correctly 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.