试题与答案

标有“6V,6W”,“6V,3W”的灯泡L1和L2,串联在某电源上,设灯丝电阻不

题型:选择题

题目:

标有“6V,6W”,“6V,3W”的灯泡L1和L2,串联在某电源上,设灯丝电阻不变,则下列说法正确的是(  )

A.通过L1、L2的电流之比为2:1,

B.灯L1、L2的实际功率之比为2:1

C.电源电压为18V时,灯L1正常发光

D.电源电压为9V时,灯L2正常发光

答案:

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参考答案:C解析:本题旨在考查考生对基础心理学中感受性与感觉阈限的掌握情况。感觉器官对适宜刺激的感觉能力叫感受性,感觉能力强,感受性就高,感觉能力弱,感受性就低。感受性的高低可以用刚刚引起感觉的刺激...

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