[填空题]
The potential differen5 j- pz -mzs*7rkeu+ch 7nh1nolpx1 o5kb:c 9ace ($V$) 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 the uncertainty is the smallest va w 2wgb+an+94ckbz0xj.uyw 8zlue which it can recorku8x gwa+ wzz w4+bn.bc92jy0d, $0.01 \mathrm{~V}$. 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