Kognity IB Physics A.0 Measurements & Uncertainty (id: e2aabeaac)

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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 translates graphicallk7z(5l2gc6ez3)c; x n uk 0aj qni9nfdy into a straight line going through the origin (whe 5g9ec6qcknzfj0nd ;aikx2)u( 7 n lz3n one quantity is doubled, the other quantity is also doubled). 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.