本题目来源于试卷: DC Circuits，类别为 IB物理学
[问答题]
You have a single 60( x-wqg1h hl6t-W bulb on in your room. c:pq ah,5h/wcHow does the overall resistance of your room’s electric circuit change when you t h,chpwca :q/5urn on an additional 100-W bulb?
参考答案: There is more current flowing in
the room’s wiring when both bulbs are on, yet the voltage remains the
same. Thus the resistance of the room’s
circuit must have decreased. Also, since
the bulbs are in parallel, adding two resistors in parallel always results in a
net resistance that is smaller than either of the individual resistances.
本题详细解析:
暂无
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