公式P=I2R=U2/R说明()。A、当电阻中的电流一定时,电阻消耗的功率与电阻值成正比B、当电阻上的电压一定时,电阻消耗的功率与电阻值成反比C、当电阻值一定时,电阻消耗的功率与电流成正比D、当电阻值一定时,电阻消耗的功率与电压成正比

公式P=I2R=U2/R说明()。

  • A、当电阻中的电流一定时,电阻消耗的功率与电阻值成正比
  • B、当电阻上的电压一定时,电阻消耗的功率与电阻值成反比
  • C、当电阻值一定时,电阻消耗的功率与电流成正比
  • D、当电阻值一定时,电阻消耗的功率与电压成正比

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