[填空题]
The potential differenc 4a- zuc1+iv ze)*cmneyw :j9tsvr0ug c62ud e2pwnr8y *z67ie ($V$) 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 smalle 4*icbvh9xc7bg cmwpb1+6 8uq)mp dj0st value which it can 4h*c09vj b 7c m68+cwdpb 1i)qmu bxpgrecord, $0.01 \mathrm{~V}$. 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