[填空题]
The potential differencewxlr0l,uc3zvo3 r39q( g m4cq (9w ak. se gt3 6hhpl+x4m2e2u+i xb/s ufj:t2b$V$) across a resistor is measured with a digital voltmeter to be $0.10 \; V$ . What is the percentage uncertainty in $V^2$ ? % (only put numerical values in the blank and keep two significant figures.)
参考答案: 20.00
本题详细解析: The voltmeter is a digital da3-zc atuu/ icc 3/o7exupf ;nl:rx;1evice and so the uncertainty is the smallest value which it can rece :n7c3/ut3;xpazc -i r;l1f cuo xau/ord, $0.01 \mathrm{~V}$. 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