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

[单选题]
The variation of quantits6y nlr w .jdx4se,*1jys6u hpwo262 te59vwxs P as quantity Q varies is plotted. Theory states that P should vary linearly with petohww 2s629vsx 65uQ.

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 througyg8zl9 6u m7k ro tn051csff+kh 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 taken0kfmr 9tc8kl6znfogsy 7 5+u 1 of evidence of a systematic error only if there is good theoretical reason to believe that the line must go through the origin.