[填空题]
The potential differ2k)ps(z * oig4 boez9hence (v p:uj1ww(ep)nhf 0o+lwb,8 f$V$) 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 andxa,y0k 5qt*yz so the uncertainty is the smallest value which it ca5y *0k,az txyqn 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