问题
多选题
| 理想变压器原线圈接在如图所示的电压上，原副线圈匝数之比为10：1，串在原线圈上的电流表的示数为1A，则以下叙述正确的是（ ） A．变压器输出功率为200W B．若n1=100匝，则输出端线圈的磁通量变化率的最大值为2 C．副线圈两端的电压表示数20 D．变压器的输入功率是由发电厂的输出功率决定的  |
Wb/s
V
答案
AB
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| 理想变压器原线圈接在如图所示的电压上，原副线圈匝数之比为10：1，串在原线圈上的电流表的示数为1A，则以下叙述正确的是（ ） A．变压器输出功率为200W B．若n1=100匝，则输出端线圈的磁通量变化率的最大值为2 C．副线圈两端的电压表示数20 D．变压器的输入功率是由发电厂的输出功率决定的 |
AB
| 把与图片相对应的描述的序号填到图下的横线上 |
| A. John is a boy. He is of medium height with short curly hair. He is wearing a green T-shirt,dark green pants and blue shoes. B. Sarah is my aunt. She is fifty-five. She is heavy with glasses. She has short black hair. She is wearing an orange dress. C. Nancy is good-looking. She has short curly black hair. She is wearing a beautiful yellow dress and orange shoes. D. Bruce is a doctor. He is of medium build. He has short hair and he wears small glasses. He's wearing a brown and white sweater and blue pants. E. Jim is my friend. He's tall and thin with straight brownhair. He is wearing a white shirt, black pants and blue shoes. |
     1 ._____ 2 ._____ 3 ._____ 4 ._____ 5. _____ |