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

[单选题]
By averaging three measurements of the samsc63 zu,.yc* lwg.)hkwy (hg te quantity which of the fol p2 n7i1etty:bsu2nz; lowing can ; zt y1nsn2ue7t2b:pi be 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 instrujp+ug+s 7(bvi h(1z5.o iyvlx mentation or consistently bad technique. Averaging repeated measurements will not change a systematic bias. So B & C are incorrect. Z5sjv 7i bhx(vz p+i.gu+ o1l(yero 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.