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

[单选题]
By averaging three measurepffohu7 :kt g j6ti/17ments of the same quantity which of the following cami5y e 4he p14i+.0np 1 qqg/kzb3kjpzn q5h0i4gk+ibkq1 4 yj3zpne.p1zp e /mbe reduced?

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 i9*x:yyhhyz a1 nstrumentation or consistently bad technique. Averaging repeated measurements will not change a systematic bias. So B & C are incorrect. Zero errors are ex9 y1zh*hy ay:xamples 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.