中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.下列关于电磁现象的说法中正确的是（ ）
| A: 磁场看不见、摸不着，所以我们无法通过一些现象来认识它 |
| B: 相互吸引的两磁极是同名磁极 |
| C: 通电导线周围磁场的方向与电流方向有关 |
| D: 电磁铁的磁性强弱只与电流大小有关 |
一次做对，真牛！
+5奖励规则>
- 提示1：6YCa55S15a+857q/5ZGo5Zu056OB5Zy655qE5pa55ZCR5LiO55S15rWB5pa55ZCR5pyJ5YWz77yM55S15rWB5pa55ZCR5pS55Y+Y77yM56OB5Zy65pa55ZCR5Lmf5pS55Y+Y
- 答案：Qw==
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本课配套习题挑战模式2/5
多选题
难度系数：
2.关于电磁现象,下列说法中正确的是（ ）
| A: 看不见的磁场是客观存在的 |
| B: 磁场是由疏密不同的磁感线组成的 |
| C: 电流周围的小磁针会受到磁场力的作用 |
| D: 磁体具有磁性,磁极是磁体上磁性最强的部分 |
一次做对，真牛！
+5奖励规则>
- 提示1：56OB5Zy66Jm954S255yL5LiN6KeB44CB5pG45LiN552ALOS9huaYr+Wug+aYr+ecn+WunuWtmOWcqOeahA==
- 提示2：56OB5Zy65piv5a2Y5Zyo5LqO56OB5L2T5ZGo5Zu055qE5LiA5Liq56m66Ze05Zy6LOiAjOejgeaEn+e6v+aYr+S4uuS6hueglOeptuaWueS+v+iAjOWcqOejgeWcuuS4reWBh+aDs+eahOS4gOS6m+acieaWueWQkeeahOabsue6vyzmlYXno4HmhJ/nur/kuI3nrYnkuo7no4HlnLo=
- 提示3：6YCa55S15a+857q/5ZGo5Zu05a2Y5Zyo552A56OB5Zy6LOejgeS9k+mXtOeahOebuOS6kuS9nOeUqOWwseaYr+mAmui/h+ejgeWcuuWPkeeUn+eahA==
- 提示4：5YW35pyJ56OB5oCn55qE54mp5L2T56ew5Li656OB5L2TLOejgeS9k+S4iuejgeaAp+acgOW8uueahOmDqOWIhuensOS4uuejgeaegQ==
- 答案：QSxDLEQ=
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.关于下列四幅图的说法正确的是（ ）
A:  如图的实验是演示电磁感应现象的实验装置，所揭示的原理可制成电动机 |
B:  如图的实验说明磁场对电流的作用，所揭示的原理可制成电动机 |
C:  如图说明磁场能产生电流，它第一次揭示了电和磁之间的联系 |
D:  如图中说明了地磁场的方向 |
一次做对，真牛！
+5奖励规则>
- 提示1：6Zet5ZCI5byA5YWz5YmN77yM5a+85L2T5Lit5peg55S15rWB6YCa6L+H77yM5a+85L2T5Zyo56OB5Zy65Lit6Z2Z5q2i5LiN5Yqo77yb5byA5YWz6Zet5ZCI5ZCO77yM5b2T5a+85L2T5Lit5pyJ55S15rWB6YCa6L+H5pe277yM5Zyo56OB5Zy65Lit6Z2Z5q2i55qE5a+85L2T6L+Q5Yqo6LW35p2l77yM6K+05piO6YCa55S15a+85L2T5Zyo56OB5Zy65Lit5Y+X5Yiw5Yqb55qE5L2c55So77yO5Yip55So6L+Z5LiA5Y6f55CG5Y+v5Yi25oiQ55S15Yqo5py6
- 答案：Qg==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.关于下列四幅图的说法正确的是（ ）
| A: 图a说明人站在绝缘体上仅管双手触电，仍然是安全的 |
| B: 图b是探究磁场对电流的作用 |
| C: 图c是研究电磁铁磁性强弱与线圈匝数的关系 |
| D: 图d用两只凸透镜一前一后观看物体，只能探究望远镜 |
一次做对，真牛！
+5奖励规则>
- 提示1：5Zu+5Lit5Lik55S156OB6ZOB5Liy6IGU77yM55S15rWB55u45ZCM77yM5Zug5q2k5piv56CU56m256OB5oCn5by65byx5LiO57q/5ZyI5Yyd5pWw55qE5YWz57O7
- 答案：Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.小磁针静止时的指向如右图所示，由此可知（）
| A: a端是通电螺线管的N极，c端是电源负极 |
| B: a端是通电螺线管的N极，c端是电源正极 |
| C: b端是通电螺线管的N极，d端是电源负极 |
| D: b端是通电螺线管的N极，d端是电源正极 |
一次做对，真牛！
+5奖励规则>
- 提示1：5bCP56OB6ZKI6Z2Z5q2i5pe2TuaegeWQkeWPs++8jOWboOWQjOWQjeejgeaegeebuOS6kuaOkuaWpe+8jOW8guWQjeejgeaegeebuOS6kuWQuOW8le+8jOaVheWPr+efpeieuue6v+euoWHnq6/kuLpO5p6B77yMYuerr+S4ulPmnoE=
- 提示2：55Sx5a6J5Z+55a6a5YiZ5Y+v55+l77yM6K6p5Y+z5omL55qE5aSn5aeG5oyH5oyH5ZCR772B56uv77yM5YiZ5Zub5oyH5byv5ZCR55qE5pa55ZCR5Y2z5Li66J6657q/566h5LiK55S15rWB55qE5pa55ZCR77yM5Y2z55S15rWB55SxYeerr+a1geWFpe+8jOaVheeUtea6kOeahGPnq6/kuLrmraPmnoHvvIxk5Li66LSf5p6B
- 答案：Qg==
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