本题目来源于试卷: gc textbook chapter 18 Electric Currents，类别为 IB物理学
[问答题]
If the resistance of a sma6 ufi0/+k7muth- hxpyll imm qcw ui3i a8) bxr7dpvgqd;,5a2+gj *sj xt0s,ersion heater (to heat water for tea or soup, Fig. 18–32) was increased, would it speed up or slow down the hc7*bs,;q5auvp+ gjidtxs rg20,qd8wx)j a i 3eating process? Explain.
参考答案: We assume that the voltage is the
same in both cases. Then if the
resistance increases, the power delivered to the heater will decrease according
to $P\,=\,V^2R$.. If the power decreases, the
heating process will slow down.
本题详细解析:
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