题目内容
(1)(2分)图甲种给出的是螺旋测微器测量仪金属板厚度时的示数,读数应为 mm.
(2)(6分)小球做直线运动时的频闪照片如图乙所示,已知频闪周期T=0.1s,小球相邻位置间距(
由照片中的刻度尺量得)分别为OA=6.51cm,AB=5.59cm,BC=4.70cm,CD=3.80cm,DE=2.89cm,EF=2.00cm。小球在位置A时速度大小
= m/s,小球运动的加速度大小
=
m/s2.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241229348276196.jpg)
(3)(6分)某同学用伏安法要准确测定一只约200电阻的
阻值,除北侧电阻外,还有如下实验仪器
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241229348582451.jpg)
E.电流表
(量程0—250mA,内阻约为0.1Ω)
F.滑动变阻器一只,阻值0—20Ω
G.电键一只,导线若干
在上述仪器中,电压表应选择 (填“
”或“
”),电流表应选择 (填“
”或
“
”)。请在方框内画出电路原理图。
(2)(6分)小球做直线运动时的频闪照片如图乙所示,已知频闪周期T=0.1s,小球相邻位置间距(
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412293476472.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122934780208.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122934796192.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412293476472.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241229348276196.jpg)
(3)(6分)某同学用伏安法要准确测定一只约200电阻的
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412293484272.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241229348582451.jpg)
A.直流电源(电压3V,内阻不计) |
B.电压表![]() ![]() |
C.电压表![]() |
D.电流表![]() |
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122934936219.gif)
F.滑动变阻器一只,阻值0—20Ω
G.电键一只,导线若干
在上述仪器中,电压表应选择 (填“
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122934936217.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122934967223.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122934983227.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412293484272.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122935030227.gif)
(1)7.324(7.323~7.325均给分)
(2)
0.605 0.9
(3)A1 V1
(2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412293476472.gif)
(3)A1 V1
略
![](http://thumb2018.1010pic.com/images/loading.gif)
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