[填空题]
The potential differe 3j2q ,b7r2db*q o5bg7thz dve yxtb.b)pehh* 4 cpr-,nce ($V$) 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 u ftjc,t wwy5pi.6(oyx5 pj8v6ncertainty is the smallest value which ijy.x8 fyw56 c( ,p6pittvw5 jot can 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