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

[单选题]
The variation of quantity P1 v9pk(pvu;og 0d*wtq +q7 iyte xnqc d e69/sli)o1u92*xplras quantity Q varies is plotted. Theory states that P x)+y/96ecdsexq int9 oulpq r*17l2ishould vary 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 believql7.rm ib d(4te that 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 take.qlr 4bi(m t7dn of evidence of a systematic error only if there is good theoretical reason to believe that the line must go through the origin.