[填空题]
The potential difference z.7xxtpr 9vucz7z1+ wv3 m1ib)gw -nm(nfnn )($V$) 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 thekq* fvpo/nj+kd k,u. 6mpg9qelk p3 59 j+jlw3 uncertainty is the smallest value which ip k6.k9jw +vegkd q5n/3ll jm9pu3kp,f*q+ jot 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