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题 1 of 1
1. 题
WL18.5【ZKWL14.17.2】
标有“4V 1W”的小灯泡和“20Ω 1A”的滑动变阻器连接在电路中，如图，电源电压为6V，电流表量程为“0 ~ 0.6A”，电压表量程为“0 ~ 3V”。
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为确保电路安全，闭合开关S 时，滑动变阻器接入电路的阻值应控制在 Ω到 Ω范围内。(不考虑温度对电阻的影响)
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