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

[单选题]
By averaging three measuremq:gs w;hr-nq) whvh (/j2vh 2tents of the smxzi *-ac7 ppb8b;am;vv7d 3same quantity which of the following can bs -ap v7abcv7izmmd83;*bp ;xe 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 o;hyl ,7ck0b/+ 3q jjtgqc+r qinstrumentation 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 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 e/0 ho +gkrb,jtl c7q;yj cq+q3rror. Hence A is correct.