[填空题]
The potential differwdktr; za+4-v,kkz: jurgg 9 ;yypycptqy4-a t2 1m0 ll 1(3ggence ($V$) 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 y,ktg crj (tydx 4ofj,, 05r9odevice and so the uncertainty is the smallest value which it c4 j xy,0,9fyrct(d k,jr oto5gan 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