[填空题]
The potential differen+a 1tw 2bj0m p/d8hzjlsw;nc92)anej3 )qt6 x b,ojri ce ($V$) 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 the l(7 px h55:e9r2xzlswm yvib+ uncertainty is the smallest value which 7ps(yxe952l+vbil5xz r wh: mit 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