如图：+ A—[1]——[1]——[1]——[1]— （“[]”里的单位为
| | | | 欧姆）
[4] [4] [4] [2]
| | | |
- B—[1]——[1]——[1]——[1]—
图中所有电阻的额定功率为4瓦,若从A点流入的电流为2安,则图中阻值为二的那个电阻消耗的功率为__瓦(答案为0.125,
+ A—[1]—[1]—[1]—[1]— （“[]”里的单位欧）
```````````````````````````|``````|`````|`````|
``````````````````````````[4]``[4]``[4]``[2]
```````````````````````````|``````|`````|`````|
````````````````- B—[1]—[1]—[1]—[1]—