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

[单选题]
The variation of quantity P as quantity Q varies is plotted. Thef0q) y kno d)sfm;:8hjoo mdp)7;7xip(uh 2vrory states that P should varxp7r ;pm dh)ovu(7o2iy 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 that all graphs must go t+uius+z lso*jh4z/g; hrough the origin. In physics many do not. But the scatter of the points suggests there a*u+o +l/jszuihg sz; 4re 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.