[填空题]
The potential differen-(uldft qa*5 i3/ i+ u1 s ivk2ouj/s;m i:ceqa.nme-jce ($V$) 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 devic7 4yt t 1lrts/8fg:zlpe and so the uncertainty is the smallest value which it cant8z4lps1grty / tl: f7 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 $20 \%$.
