jjjjjn 發表於 2013-3-8 12:49
long wires have more resistance than short wires?
In: Electronics Engineering, Physics, Electrical E ...
師兄你漏左貼第二段，我幫你補返。
"the cross-sectional area of the wires will affect the amount of resistance. Wider wires have a greater cross-sectional area. Water will flow through a wider pipe at a higher rate than it will flow through a narrow pipe. This can be attributed to the lower amount of resistance which is present in the wider pipe. In the same manner, the wider the wire, the less resistance that there will be to the flow of electric charge. When all other variables are the same, charge will flow at higher rates through wider wires with greater cross-sectional areas than through thinner wires."
[複製鏈接]
發表於 2013-3-23 00:32
