题目内容
如右图交流电,下列说法正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250040469712997.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250040469712997.jpg)
A.周期为0.02s |
B.有效值为200V |
C.将该交流电压加在一个5Ω定值电阻两端,1分钟的发热量为600000J |
D.将该交流电压加在发光和熄灭电压均为150V的氖管上,氖管未被击穿,氖管1分钟发光次数为60次 |
AC
试题分析:由图知,交流电的周期为0.02s,A正确;一个周期内的前
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004046987303.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004047049336.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250040470651457.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004047080305.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004047096571.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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