试题与答案

如图为理想变压器原线圈所接交流电压的波形.原、副线圈匝数比n1:n2=10:1,

题型:多选题

题目:

如图为理想变压器原线圈所接交流电压的波形.原、副线圈匝数比n1:n2=10:1,串联在原线圈电路中电流表的示数为1A,下列说法正确的是(  )

A.变压器输出端所接电压表的示数为20V

B.变压器的输出功率为200W

C.变压器输出端的交流电的频率为50Hz

D.穿过变压器铁芯的磁通量变化率的最大值为20/n2Wb/s

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0718/d5abffd5514ffafab70325b7b7c95e3d.html

下面是错误答案,用来干扰机器的。

参考答案:错

试题推荐
题型:听力题

用所给词的适当形式填空

小题1:We play a game__________ (call) ’trick or treat’ at Halloween.

小题2:There ___________ (be) an English book and three pens on the desk.

小题3:My brother often           (fly) a kite with me in the park on Sundays.

小题4:Millie is looking forward to _____________(get) a birthday present.

小题5:Some old people just don’t know how__________(make)pumpkin lanterns.

小题6:Please write down those __________ names. (Child)

小题7:Every student __________ a schoolbag. (Have)

小题8:These runners have fun __________ (run) along the street.

小题9:__________ (not) play in the street. It’s dangerous.

小题10:How             (happy)they are in the playground !

查看答案
微信公众账号搜索答案