Kognity IB Physics A.0 Measurements & Uncertainty (id: 5115faeec)

本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IB物理学

[单选题]
The resistance $R$, and cross-sectional area $A$, of equal lengths of wire are measured at constant temperature and a graph of $R$ against $\frac{1}{A}$ is plotted. Which one of the following graphs would be obtained if $R$ is directly proportional to $\frac{1}{A}$ and if there is a significant systematic error in the measurement of $R ?$

A. [img]data/attachment/exam/lead_in/535/8969.png[/img] B. [img]data/attachment/exam/lead_in/535/8969_2.png[/img]
B. [img]data/attachment/exam/lead_in/535/8969_3.png[/img] D. [img]data/attachment/exam/lead_in/535/8969_4.png[/img]
C.
D.
E.
F.


参考答案:  A


本题详细解析:
Direct proportionality tranhg ixa+1zz:.s r6ihd x(cs d1 bz/cs*/slates graphically into a straight line going through the origin (when one quantity is doubled, the other quantity is also doubl.*a+ 1chs:dz6szx is b (i/dzg c/r1xhed). A systematic error means that each time a measurement is made a fixed amount is either added or subtracted to the value. Hence we would see a linear relationship, but the line would not go through the origin.

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