[填空题]
The potential differenop f -lz(;v+y4 bvsw7yox;7jocux;m-k z)jf5 c5tv(snl d(zzafq+ s *7e ($V$) 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 n 3dqpeczp,;v3,x.e4q0 n)anx ya nh)so the uncertainty is the smallest value which it c) 3x dzaa).nxy,4eq0p3c;nv nenh,qpan 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