[填空题]
The potential difference in/rrvjt0;-sg5da,. ovhn d ,5 5g0bydnase8*n ss)j($V$) 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 unc.g5,zf5cofc/cn; o.pqj ao p1ertainty is the smallest value which it cfa o/;, ncfp5.j5.ocgzqo pc1an 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