您所在的当前位置：高中物理试题 >

共点力的平衡

> (14分)水平放置的平行板电容器，板间距离为d，极板足够长，当其带电荷量为Q时，沿两板中央水平射入的带电荷量为q的小球恰好做匀速直线运动。若使电容器电量增大一倍，则该带电小球由两板中央落到某一极板上所需时间为多少？(已知重力加速度g)

问题：

发布时间：2024-09-12

(14分)水平放置的平行板电容器，板间距离为d，极板足够长，当其带电荷量为Q时，沿两板中央水平射入的带电荷量为q的小球恰好做匀速直线运动。若使电容器电量增大一倍，则该带电小球由两板中央落到某一极板上所需时间为多少？(已知重力加速度g)

参考答案：

提问用户：fo***Mzt

可能感兴趣的题目：

1 中国人民银行定于2011年4月15日发行中国京剧脸谱彩色金银纪念币，其中银纪念币材料为铜芯镀银，依据你所掌握的电镀原理，你认为银纪念币制作时，铜芯应做 A．阴极 B．阳极 C．正极 D．负极
2 阅读理解。 Italian Lakes and Greek Islands(12Days) Prices starting from $1,999 Your tour begins in Milan, Italy, and moves on to the pretty Italian Lake District and the attractive resort (胜地) of Stresa, your home for two nights. Collette Vacations has carefully chosen the Costa Victoria as your home away from home for your 7-night journey along the waterways of the Mediterranean. The cruise ship is filled with the warmth and culture of Italy and is richly designed with entertainment (娱乐) areas and very good living conditions. It will take you to the places of your dreams. You"ll spend 4 days touring Greek cities you"ve always heard about. In Katakolon, you will have the only unguided tour to nearby Olympia on the whole journey. Then with a local guide you will visit the Greek islands of Santorini, which is often related to the story of the lost city of Atlantis, and Mykonos, a wonderful island with beautiful beaches. Your journey ends in Verona, home of the love story Romeo and Juliet, with a fun-filled farewell dinner-a perfect ending to a pleasant journey. 12Day,25Meals:10Breakfasts,6 Lunches,9Dinners Day 1 Overnight flight to Italy Day 2-3 Regina Palace,stresa, Italy Day 4-10 Costa Victoria(Costa cruises) Day 11 Hotel Leopardi,Verona, Italy Day 12 Leave for home Please Note: Leaving date Price for one person April 7 ＄2, 099 June 2 ＄2, 199 October 6 ＄2, 099 November 3 ＄1, 999 1. How is the journey planned? A. It starts and ends in Italy. B. It starts and ends in Greece. C. It starts in Italy and ends in Greece. D. It starts in Greece and ends in Italy. 2. What can be inferred from the travel plan? A. The price may get lower than those in the plan. B. The prices include three meals a day. C. The price is the highest in summer. D. The prices include entertainment service. 3. What does the underlined part "the Costa Victoria" most probably refer to? A. Afamous hotel. B. A beautiful resort. C. A comfortable ship. D. A long-distance bus. 4. Tourists will travel on their own in ____. A. Stresa B. Olympia C. Mykonos D. Verona
3 依次填入下列各句横线处的词语，最恰当的一项是 ①网络歌曲词作者刻意追求“陌生化”、“小清新”等效果，导致不少歌词出现直白、浅俗、口水化等问题，__________业界诟病。 ②为破除城镇化“千城一面”“千村一面”怪圈，留住齐鲁特色乡愁，__________地方历史文化。我省从2014年起开始全面实施“乡村记忆工程”。 ③在《咬文嚼字》发布的“2013流行语排行榜”中，“中国梦”以其清新的理念和亲民的风格广为民众认同，__________十大流行语排名榜第一位。 A．备受继承位居 B．备受传承位居 C．倍受传承跃居 D．倍受继承跃居
4 已知，为上的点. （1）当；（2）当二面角 — — 的大小为的值.
5 tan22.5°- 1 tan22.5° =______．
6 古人形容图现存最古老的石拱桥“百尺长虹横水面，一弯新月出云霄。”这座桥修建于 A．秦朝 B．汉朝 C．隋朝 D．唐朝
7 实验装置如图所示，当导体棒做切割磁感线运动时，电流表指针发生偏转，这个现象说明电路中的电能是由导体棒的______能转化的．根据这一原理人类发明了______机．
8 已知是双曲线上不同的三点，且连线经过坐标原点，若直线的斜率乘积，则该双曲线的离心率为(　　) A． B． C． D．
9 “凤阳地多不打粮，磙子一住就逃荒”。“自从分地包产后，家家生活大变样”。这两段《凤阳花鼓》词中安徽凤阳农民生活的变化与下列哪一政策息息相关？（） A．“大跃进” B．对农业的社会主义改造 C．人民公社化运动 D．家庭联产承包责任制
10 如图所示，在平行六面体ABCD-A 1B 1C 1D 1中，设，M、N、P分别是AA 1、BC、C 1D 1的中点，试用a、b、c表示以下各向量：