题干

实验小组的同学进行电磁学实验.

(1)在如图A所示的实验中,当闭合开关后,可观察到磁场中金属棒ab在导轨上运动,这说明磁场对通电导体____ .

(2)在如图B所示的实验中,闭合开关,保持蹄形磁体不动,若使导体AB沿____ (选填“竖直”或“水平”)方向来回运动,则灵敏电流计的指针将发生偏转.此时产生的电流是____ (选填“交流电”“直流电”),此实验是将机械能转化成____ 能的过程.

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答案(点此获取答案解析)

有力的作用,水平,交流电,电

同类题5

匹对阅读。根据对五个人的描述,从八则广告中选出最恰当的选项并把它的字母编号写在题号前的括号内。

____Xiao Feng,a student is from China. But she is crazy about American music. And she is only free on Saturday.

____Windy, a Beijing University student comes from England. She wants to know what happened in China in the past.

____Fan Fan is a 13—year—old boy. Tomorrow is his mother's birthday, but he isn't sure what he should buy for her.

____Dan Dan, a 16 —years—old student comes from a poor family. She goes to school from Monday to Friday. And she is looking for a part—time job.

____Xia Mei is a dance lover. She can give a wonderful Chinese dance, but she wants to learn more.

A Live Music—Late Night Jazz

    Enjoy real American jazz from Herbie Davis, the famous trumpet player. He is known to play well into the early hours, so don't lose the chance(机会).

B Scottish Dancing

    Scottish dancing is nice and easy to learn. The wonderful dance from England will by given.

C Show—Anhaul Museum

    There are 12000 pieces on show here .You can see the whole of Chinese history.

D Rose Hotel

    1Oct—31Mar. $198 for a night; 1Apr.—30Apr. closed; 1May—30Sep.$218 for a night.

E Wanted

    The best gift for the woman who has birthday.

F Saturday Job

    Cleaner(16+) for company in Hoe. 8am—1pm only $5 an hour. Tel:47885445

G Reporter Wanted

    New Evening Paper is looking for a reporter between 13 and 16 to work from 4pm to 6pm weekday. Tel: 0451—865541

H Prince of the Piano

    Richard Clayderman, the French pianist who is widely known as “ the Prince of the Piano”, will give his concert this Sunday night, at 8.00 at Flower

Hall, City College.