[填空题]
The potential differen/z :nl1w9pubmt sre xp,:6v5ecexgj 7l+m*c g938 vkklj ($V$) 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 digi(:7s 4ucnwgwmz2hie*sgv3 l1+ g s6lv4pf/ jltal device and so the uncertainty is the smallest value which it can relw 4n3+j ssz g: legmihcvu7g*1s /plvw 64f(2cord, $0.01 \mathrm{~V}$. 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