本题目来源于试卷: Electric Currents，类别为 IB物理学
[问答题]
The heating element in a toaster is .(*flatk,(y: ku)yh ti8wr 0szh8yci made of Nichromed/sggo*j):6 .*7go rib-llau4m khl e wire. Immediately after the toaster is turned on, ig:eg bi ljuolmgo kdlr6*a)* /.-4s7hs the current $(I_{rms})$ in the wire increasing, decreasing, or staying constant? Explain.
参考答案: When the toaster is first turned
on, the Nichrome wire is at room temperature.
The wire starts to heat up almost immediately. Since the resistance increases with
temperature, the resistance will be increasing as the wire heats. Assuming the voltage supplied is constant,
then the current will be decreasing as the resistance increases.
本题详细解析:
暂无
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