问题
多选题
如图所示，理想变压器原副线圈匝数之比为4：1，原线圈接入一电压为u=220 sin100πtV的交流电源，副线圈接一个R=27.5Ω的负载电阻．则下述结论正确的是（ ）A．副线圈中电压表的读数为55V B．副线圈中输出交流电的周期为0.01s C．原线圈中电流表的读数为0.5A D．原线圈中的输入功率为110  |
W
答案
AC
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| 如图所示，理想变压器原副线圈匝数之比为4：1，原线圈接入一电压为u=220sin100πtV的交流电源，副线圈接一个R=27.5Ω的负载电阻．则下述结论正确的是（ ） A．副线圈中电压表的读数为55V B．副线圈中输出交流电的周期为0.01s C．原线圈中电流表的读数为0.5A D．原线圈中的输入功率为110 |
AC
There was a big sea bird that was very beautiful. One day, the sea bird 46_________ to a country and stayed outside of a palace. The Emperor asked his men to bring it to the palace. Then he said , “As a welcome for the sea bird, we’ll 47___________the band and get the best food and wine ready for 48____________. So they played the best music for the sea bird, but it 49__________ bored. The Emperor introduced the most delicious food and best wine and asked the bird to have them. But the sea bird 50__________. After three days 51_________ eating or drinking, the sea bird died. The Emperor said 52__________, “Why didn’t you eat? I have you all of the best!” The 53__________ tells us that what some people believe to be the best music and the best food aren’t so for 54_________. Feed a bird according to a bird’s wants, not a 55_________. The saying “Do to others as you would have others do to you.” Is never really suitable or right.
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