题目内容
额定电压为4.0V的直流电动机的线圈电阻为1.0
,正常工作时,电动机线圈每秒产生的热量为4.0J,下列计算结果正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003521008333.png)
A.电动机正常工作时的电流强度为4.0A |
B.电动机正常工作时的输出功率为8.0W |
C.电动机每分钟将电能转化成机械能为240.0J |
D.电动机正常工作时的输入功率为4.0W |
C
试题分析:由焦耳定律
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003521008600.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003521040453.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003521040516.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003521164519.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003521180648.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目