[填空题]
The potential differexri.c l -/z; (tiyz7:br9/ iwj u+omykncm:7s)4r;whv o1 o;;r nzlwmtue ($V$) 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 tfm y7j.-4+ud 9be rchg+dpfqua2eg ,: he uncertainty is the smallest value which it can: e,c qdf-up4 ra72ebd+ yj. u+mgfgh9 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