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

[单选题]
By averaging three measurxnc ,o1 7ap9vc6emc6bements of the.vov zwp *zg;mwf+ 93(qg2z5s1dlw q4 wgjw9b same quantity which of the following can be reduqd5.w o g31s*wggwbwlwpjv(v4+ zq29 fz9mz;ced?

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 consistenk3o;j4tjcamt3)g j cu( g9 i5qtly bad technique. Averaging repeated measurements will not change a systematic bias. So B & C are incorrect. Zero error( jcogq3t m jk3j);ugai5tc49 s 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.