[填空题]
The potential differugd dii ar((u6b(d7 e,d1z, hu..7apqv 9. fsify9ncm6wr1yb ence ($V$) 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 the lnx -ns3 wdps(d9r7x; 6xofi+smallest value which itfi93x+;7dnwr (n6 s-xsldp xo 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