[填空题]
The potential differentp9f+f7 ,).yjpo)th eh*haopce (r0q2shut dydw)i 04m 0$V$) 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 uncertainty is thj:yaxz:ec gb*t :6/) xjq.qn ow*jh /xe smallest value whj)j own:*ajy 6/b./xqc*z e::hxxgt qich it 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