2017-2018学年物理人教版选修1-13.2法拉第电磁感应定律同步练习

1.

如图，一载流长直导线和一矩形导线框固定在同一平面内，线框在长直导线右侧，且其长边与长直导线平行。已知在t=0到t=t₁的时间间隔内，直导线中电流i发生某种变化，而线框中感应电流总是沿顺时针方向；线框受到的安培力的合力先水平向左、后水平向右。设电流i正方向与图中箭头方向相同，则i随时间t变化的图线可能是（）

A．

B．

C．

D．

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2.

下面关于感应电动势和感应电流的说法中，正确的是

A．在一个电路中产生了感应电流，一定存在感应电动势

B．在一个电路中产生了感应电动势，一定存在感应电流

C．在某一电路中磁通量变化越大，电路中的感应电动势也就越大

D．在某一电路中磁通量变化越小，电路中的感应电动势也就越小

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3.

如图所示，由一根金属导线绕成闭合线圈，线圈的半径分别为R，2R磁感应强度B随时间t的变化规律是B=kt(k为大于零的常数)，方向垂直于线圈平面。闭合线圈中产生的感应电动势为( )

A．

B．

C．

D．

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4.

用相同的导线绕制的边长分别为L和2L的正方形闭合线框，以相同的速度匀速进入右侧的匀强磁场，如图所示，在线框进入磁场的过程中a、b和c、d两点间的电压分别为

和

，ab边和cd边所受的安培力分别为

和

，则下列判断正确的是

A．

B．

C．

D．

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5.

一个闭合线圈放在变化的磁场中，线圈产生的感应电动势为E ，若仅将磁通量的变化率增加为原来的4倍，则线圈产生的感应电动势变为（　　）

A．4E

B．2E

C．E

D．E/2

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6.

研究表明，地球磁场对鸽子识别方向起着重要作用．鸽子体内的电阻大约为10³Ω，当它在地球磁场中展翅飞行时，会切割磁感线，在两翅之间产生动生电动势．这样，鸽子体内灵敏的感受器即可根据动生电动势的大小来判别其飞行方向．若某处地磁场磁感应强度的竖直分量约为0.5×10^－4T.鸽子以20m/s速度水平滑翔，则可估算出两翅之间产生的动生电动势约为( )

A．30mV

B．3mV

C．0.3mV

D．0.03mV

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7.

关于线圈中感应电动势的大小，以下的说法中正确的是（）

A．与通过线圈平面的磁感应强度成正比

B．与通过线圈平面的磁通量大小成正比

C．与通过线圈平面的磁感线的条数成正比

D．与通过线圈平面的磁通量变化率成正比

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8.You'd better ________ so late at night. It's bad for your health.

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9.You'd better ________ so late at night. It's bad for your health.

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10.You'd better ________ so late at night. It's bad for your health.

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11.

假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(^),并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；2．只允许修改10处，多者（从第11处起）不计分

Yesterday my friend Julia and me had lunch in the Pizza Hut behind our school. I knew Julia wasn't crazy about pizzas, but she came along just because me. At the table next to ours, there were two guys from our class. One of them was real funny. He tried to imitate all the customer in the Pizza Hut. We couldn't stop to laughing. And there were some people whom did not like the fact that two boys were imitating them. They complained to an owner of the Pizza Hut, so he came over and tell them to stop. Seeing it, Julia and I was greatly embarrassed.

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12.

假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(^),并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；2．只允许修改10处，多者（从第11处起）不计分

Yesterday my friend Julia and me had lunch in the Pizza Hut behind our school. I knew Julia wasn't crazy about pizzas, but she came along just because me. At the table next to ours, there were two guys from our class. One of them was real funny. He tried to imitate all the customer in the Pizza Hut. We couldn't stop to laughing. And there were some people whom did not like the fact that two boys were imitating them. They complained to an owner of the Pizza Hut, so he came over and tell them to stop. Seeing it, Julia and I was greatly embarrassed.

查看解析收藏

13.

假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(^),并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；2．只允许修改10处，多者（从第11处起）不计分

Yesterday my friend Julia and me had lunch in the Pizza Hut behind our school. I knew Julia wasn't crazy about pizzas, but she came along just because me. At the table next to ours, there were two guys from our class. One of them was real funny. He tried to imitate all the customer in the Pizza Hut. We couldn't stop to laughing. And there were some people whom did not like the fact that two boys were imitating them. They complained to an owner of the Pizza Hut, so he came over and tell them to stop. Seeing it, Julia and I was greatly embarrassed.

查看解析收藏

14.

如图为放置在水平桌面上的台灯的平面示意图，灯臂AO长为40cm，与水平面所形成的夹角∠OAM为75°．由光源O射出的边缘光线OC，OB与水平面所形成的夹角∠OCA，∠OBA分别为90°和30°，求该台灯照亮水平面的宽度BC（不考虑其他因素，结果精确到0.1cm．温馨提示：sin75°≈0.97，cos75°≈0.26， $\sqrt{3} \approx 1.73$ ）．