[填空题]
The potential differo(gdek m;4aol,(*flj3.+ vmpyx wae :en3(ls ya(dfu-vce ($V$) 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 u7qjv+ e, ts4)t(wngn f-dl,pbncertainty is the smallest value which int)g+pt 7-,njd, fl4 weq sb(vt 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