[填空题]
The potential difference3lbjdo(9 qu n*2r1;(d0q )nhkhmaiwc (6f.z+ kvtkgc4 kh -dr2$V$) 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 d8w hmmhz3 a7 e12b6rslg;6mkr evice and so the uncertainty is the smallest value which it can record, 8mgahm2zr6s;e1bk36whrml 7 $0.01 \mathrm{~V}$. 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