试题与答案

如图所示,一对足够长的光滑平行金属轨道,其轨道平面与水平面成θ角,上端用一电阻R

题型:不定项选择

题目:

如图所示,一对足够长的光滑平行金属轨道,其轨道平面与水平面成θ角,上端用一电阻R相连,处于方向垂直轨道平面向上的匀强磁场中。质量为m、电阻为r的金属杆ab,从高为h处由静止释放,下滑一段时间后,金属杆开始以速度v匀速运动直到轨道的底端。金属杆始终保持与导轨垂直且接触良好,轨道电阻及空气阻力均可忽略不计,重力加速度为g。则:

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A.金属杆加速运动过程中的平均速度小于v/2

B.金属杆加速运动过程中重力做功的功率大于克服安培力做功的功率

C.当金属杆的速度为v/4时的加速度大小是速度为v/2时加速度大小的2倍

D.整个运动过程中金属杆损失的机械能等于电阻R产生的焦耳热

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:本题涉及法官的任命。《法官法》第11条:最高人民法院院长由全国人民代表大会选举和罢免,副院长、审判委员会委员、庭长、副庭长和审判员由最高人民法院院长提请全国人民代表大会常务委员会任免。

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(5)装运期限:
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(6)装运港:
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2006DEC25 15:55:52 LOGICAL TERMINAL P005
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*ASAHI BANK LTD, <FORMERILY THE
*KYOWA SAIYAMA BANK, IJTD. >
*TOKYO
USER HEADERSERVICE CODE 103:
BANK PRIORITY 113:
MSC USER REF. 108:
INFO. FROM CI 115:
SEQUENCE OF TOTAL *27 : 1/1
APPLICABLE RULES*40 : IRREVOCABLE
DOC, CREDIT NUMBER *20 : LC-788-392328
DATE OF ISSUE *31C: 061225
EXPIRY *31D: DATE 070215
PIACE IN THE COUNTRY OF THE APPLICANT
APPLICANT *50 : NINGBO YIXIN IMP. &EXP. CO., LTD.
NO.1005 ZHONGSHAN ROAD(E.1),
NINGBO CHINA
BENEFICIARY *59 : SHINORMAN CO., LTD.
ITC BUILDING 6TH FLOOR SUITE 602
1-8-4 CHOME ISOBE-DORI CHUO KU KOBE JAPAN
AMOUNT *32B: CURRENCY HKD AMOUNT 26400,00
MAX. CREDIT AMOUNT *39 : UP TO
AVAILABLE WITH/BY *41D: ANY BANK
BY NECOTIATION
DRAFTS AT... *42C: DRAFTS AT SIGHT FOR FULL INVOICE
VALUE
DRAWEE *42A:
*ASAHI BANK LTD. <FORMERLY THE
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*TOKYO
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