[填空题]
The potential differ af 1+0p dutmz )djn+ccwlqm p52g,u49ence qq c 8wejf;odw3v4q 2ajp a6n6 b6a*v2($V$) 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 uncertainty is the smallest valu0du3 denz6htv0 :.z*oxyu;he e which it ca6odd tnz*.03 uu:ezh0evy x;h n 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