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【判断题】

如下图所示,当条形磁铁插入时,线圈两端的磁极是上N下S。

A.
正确
B.
错误
举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】Questions 57 to 61 are based on the following passage. Within fifteen years Britain and other nations should be well on with the building of huge industrial architectures for the recycling of waste. T...

A.
attempts to find efficient ways of recycling wastes
B.
efforts to protect the environment in British cities
C.
a good way to locate plants for waste recycling
D.
a cheap way to get energy from waste materials

【单选题】把一条形磁铁从中间断开,得到的是( )

A.
一段只有N极,另一段只有S极的磁铁
B.
两段各有N极和S极的磁铁
C.
两段磁极无法确定的磁铁
D.
两段均无磁性的铁块

【单选题】两个极性不同的条形磁铁相互靠近时,它们会( )。

A.
相互排斥
B.
相互吸引
C.
互不理睬
D.
有时吸引、有时排斥