[填空题]
The potential differel5rvh8;k1h;)h qa exznc 9.0cgkzz+va56s-1yg e zdnnpe ($V$) 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 uncertaak(tv)0c,g ox2n7gr c inty is the smallest value whicg)ao 0,2 vnc7t(rkc gxh it 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