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

[单选题]
The variation of quasiceol -9egygk,2ja-x 4 n1h ;nti g h-npej+:b1)z0kk zgty P as quantity Q varies is plotted. Theory states that P should vary linearly witk njz0: gb-)1z gkehp+h 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 origcg/(0 t8hg9 k,oehkmmi ;tm7yin. In physics many do not. But the 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 sysc87m;myteg 0gok9(,h kit hm /tematic error only if there is good theoretical reason to believe that the line must go through the origin.