把一个灯泡接到某电压不变的电源两端，灯泡的功率为100W。将

更新 2022-09-03
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把一个灯泡接到某电压不变的电源两端，灯泡的功率为100W。将一个电阻R与这只灯泡串联后接到同一电源两端，灯泡的功率为64W，设灯丝电阻不变。则电阻R消耗的功率是

A．8W

B．10W

C．16W

D．36W

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