本题目来源于试卷: Electric Currents，类别为 IB物理学
[问答题]
A 15-A fuse blows repeater8tca fh4qda- 8r2jz* rq6wh8dly.h,*vw 2 wqdq)m Why is it dangerous to replace this fuse with a 25-A fused*wqh qvwm2,) ?
参考答案:
The
15-A fuse is blowing because the circuit is carrying more than 15 A of
current. The circuit is probably
designed to only carry 15 A, and so there might be a “short” or some other
malfunction causing the current to exceed 15 A.
Replacing the 15-A fuse with a 25-A fuse will allow more current to flow
and thus make the wires carrying the current get hotter. A fire might result, or damage to certain
kinds of electrical equipment. The blown
fuse is a warning that something is wrong with the circuit.
本题详细解析:
暂无
| 
