Kognity IB Physics A.0 Measurements & Uncertainty (id: d9eac2f7a)

[单选题]
The variation of quantitvd3zu bu9(l1;;rfcms y P as quanaz tlpfq dq;-ba5e, 07tity Q varies is plotted. Theory states that P should vary linearly with7abat,;qdz e- 5l0 qfp Q.

A. The systematic errors are substantial.
B. The random errors are substantial.
C. The random errors and the systematic errors are insignificant.
D. The random errors and the systematic errors are substantial.


参考答案:  B


本题详细解析:
It is a mistake to believe that all graphs must go through the origin. In pheq w36vu*8+t ddl u:nsysics many do not. But theu+ 6d :w*q3lesv nd8ut scatter of the points suggests there are significant random errors. The fact that the line of best fit does not go through the origin can only be taken of evidence of a systematic error only if there is good theoretical reason to believe that the line must go through the origin.