[填空题]
The potential differenr 2eb /gdi+ mj8n8l,7fjikft4ce.bma 2,0qjfvvo) d:vw ($V$) 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 digir37 t 9gvpma+uxqi 5n;tal device and so the uncertainty is the smallest value which it can tgv3p9 7n+5m;aqi r xurecord, $0.01 \mathrm{~V}$. 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