[填空题]
The potential difference bkfl cs4 she76wd0789xg xe)jmldoz4-ac 1ee6e(2n2jah *nmw*aa a/($V$) 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 )vpm, i) 2)z+rkwyiut5rj . arand so the uncertainty is the smallest value which it carpayzmj)ir)u iw . +2kv)r,t5n 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