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

[单选题]
The variation of quantity P as quantity Q varies is ph iv0uy9*jx2r lotted. Thiy rj9 8/li2k9u eyus g0pgs-/eory states that P should 0 ry9s8/ iueg9up-gsl /yjk2ivary linearly with 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 qk 2ar)rg 9*+(ck/ovvt h-moithat all graphs must go through 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 be taken of evidence of a systematic error vgtaim* h(q9c kor - +ovk)r2/only if there is good theoretical reason to believe that the line must go through the origin.