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高一藍色暑假物理答案

高一藍色暑假物理答案

. 如圖1所示,當彈簧測力計吊著一磁體,沿水平方向從水平放置的條形磁鐵的A端移到B端的過程中,能表示測力計示數(shù)與水平位置關(guān)系的是圖2中的 ( )


圖1
A B C D
圖2


2. .在一個密閉的矩形盒子里放有2塊條形磁鐵,將一個小磁針放置到盒子的一端,當小磁針穩(wěn)定不動時,盒子里條形磁鐵的放置方式是( )

JS-T條形磁鐵

N

S

S

N

S

N

N

S

S

N

N

S

S

N

N

S

N

S

A. B. C. D.

知識點二: 磁場、磁感線

3.關(guān)于對磁感線的認識,下列說法中不正確的是 ( )

A.磁感線是為描述磁場而畫的一種假想的曲線

B.磁體周圍越接近磁極的地方磁感線越密,表示磁性越強

C.磁體周圍的磁感線都是從S極出發(fā)回到N極

D.磁感線與放不放鐵屑無關(guān) 4.如圖所示的四個圖是幾種磁體周圍的磁感線及其方向,其中畫得正確的是 ( )

5.有甲、乙兩根外形完全一樣的鋼棒,一根有磁性,另一根沒有磁性,現(xiàn)用甲鋼棒的一端接觸乙鋼棒的中部,發(fā)現(xiàn)沒有吸引現(xiàn)象,由此可知 ( ) A. 甲鋼棒有磁性,乙鋼棒沒有磁性 B.乙鋼棒有磁性,甲鋼棒沒有磁性 C. 甲、乙鋼棒都沒有磁性 D..無法判斷哪根鋼棒有磁性

知識點三: 磁化

6. 磁體除了天然磁體外還有 磁體,它是應用了 的方式制造的,制造永磁體的材料是用 鐵棒。

教科版九年級《3.1磁現(xiàn)象》參考答案

1. D 2. B


3.C 4.A 5.B


6. 人造 磁化 鋼質(zhì)


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