[填空题]
The potential difference wfi ud-y -upf/zw+:k/(31) j lqwbe)np$V$) 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 devices 7ggr. 3esb+osnc7p8 and so the uncertainty is the smallest value which n8 er3s77gbgco+ .sspit 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