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

[单选题]
The variation of quantity P as quantity Q varies is plotted. Theo+opn3-i xafuj ery+w(dy(d:, r hc/z 3;0r, yzaui7vm r10xiuuy states that P should vary linearly with Q.0ri1a3 y/hu 7i xuv zu,rzm;0c

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 tqy w)c 4.9qsghhrough the origin. In physics many do not. But the hq4gqy c.s) 9wscatter 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.