[填空题]
The potential differe ypx-tx5dp9c.pv / 7hxoi9ig ,nce (/heif.i 6 .8fkk s.svl1zj f1c$V$) 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 digitu)0,sqz+o 5vdy ysrr509qlrral device and so the uncertainty is the smallest value which it can re lr)v0u srqoy+,rqz 9 0yr5ds5cord, $0.01 \mathrm{~V}$. 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