[填空题]
The potential difference)dl1f9uaf;r):g9mh 1uu dyo h4z oln(bfsp*v jee92c:nkg 11 ($V$) 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 smamiq0sj8t56hv vd5+ k jllest value which it ca j0t5svk6jmqh v 8id+5n 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