[填空题]
The potential differy1vo:w3ogbz 1a q -2sq01m7:y3qruoiz n8 a tjence ($V$) across a resistor is measured with a digital voltmeter to be $0.10 \; V$ . What is the percentage uncertainty in $V^2$ ? % (only put numerical values in the blank and keep two significant figures.)
参考答案: 20.00
本题详细解析: The voltmeter is a digital de04af u1noy3q xvice and so the uncertainty is the smallest value which x340ayqo1nfuit 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 $20 \%$.
