本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IBDP Physics
[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  B 
C  D 
A.
B.
C.
D.
参考答案: A
本题详细解析:
Direct proportionality transbqa)av+ 5)x vqlates graphically into a straight line going through the origin (when one quantity is doubled, the other quantity is also doubled). A svx )5 +qba)qavystematic 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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Post time 2024-8-21 21:38:19