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

[单选题]
The variation of quan9d1mw,j h l yy)c.pun5tity P as quantity Qjqf1)e-yqc 0;ehiatq jk4/1l varies is plotted. Theory states that P should vary l tc-1 /eajikqf 4j;y h1e)lqq0inearly 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 that all graphs must go through the origin. z ugeboy1s 7x8grpl(:s-6(zn s f6zs; 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 thrz(ls fp-g 8uzg67zr:se1n ysb6;( osx ough 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.