[填空题]
The potential differefi7(: wmby b+za,px*r-s;f rw ncd 4o.u c4tch0ze ($V$) 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 devic-7q .s 9 ljjpq mztggdo96od*+e and so the uncertainty is the smallest value which it can record, s do+l-j9gmp9 qtd6jg*q.7zo $0.01 \mathrm{~V}$. 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