[填空题]
The potential differencvdgx8vbkpr egv 5 u4/tsw 2/,6 a8y0xy9z wdm.e.gr)g/ptb 9(bfn x(gg ($V$) across a resistor is measured with a digital voltmeter to be $0.10 \; V$ . What is the percentage uncertainty in $V^2$ ? % (please only input numerical value without units and without the $\pm$ symbol.)
参考答案: 20.00
本题详细解析: The voltmeter is a digit. co8eerms 77wal device and so the uncertainty is the smallest value whic7rco w8e7se.mh it can record, $0.01 \mathrm{~V}$. This is a $10 \%$ uncertainty on the $0.10 \mathrm{~V}$ measurement. The uncertainty in $V^2$ will be twice this, giving $20 \%$.
Post time 2024-8-21 21:38:19