[填空题]
The potential differi tk /*bzgiv(bj/ x(1ko(mbu;7( f lwbence (jz*6-hkv7/.ltxc ik nr gb 9h1-0vb rk$V$) 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 device and so the uncertainty is the smallest,k s a .rvdw)irt)ybm9(j+ l8c,-zhw u value which it can recoyzhvj,wi,r dtbs9uk-)w m+cr )(a. 8lrd, $0.01 \mathrm{~V}$. 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