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

[单选题]
The variation of quantity P as quantity Q varie hh4a)66huo,zsu7)y po3o zo es,3hlbfhc;ihk(s( + v kql1 o(c+wfwz4 is plotted. Theory states that P should vary linearly with4wz(h flq1hwkb ( vcoc+, klfs+;i3(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 througasv5o 3u5l6s: 2i;nj:qccz pz h the origin. 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 beuz 5apzs2c3vj6sl:: ;q cni o5 taken of evidence of a systematic error only if there is good theoretical reason to believe that the line must go through the origin.