[填空题]
The potential differek3b bp) + 9e.qsk df/rzl6g8zunce (yiwddr.0 n7e 6$V$) 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 digital device and so tilhfd*b.1l s8-whaj *he uncertainty is the smallest value which it1h* hib8 -.*dj fwllsa 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