题目内容
(1)图1为测量电池的电动势和内阻的实验中得到的图线,则该电池的内阻为______Ω.(保留两位有效数字)
(2)图2为螺旋测微器测量某金属薄板厚度时的示数,此读数应为______mm.
![](http://thumb.1010pic.com/pic2/upload/papers/20140611/2014061110031826912613.png)
(2)图2为螺旋测微器测量某金属薄板厚度时的示数,此读数应为______mm.
![](http://thumb.1010pic.com/pic2/upload/papers/20140611/2014061110031826912613.png)
(1)由图1所示图象可知,电池的内阻r=
≈0.83Ω;
(2)由图2所示螺旋测微器可知,其示数为0mm+39.9×0.01mm=0.399mm;
故答案为:(1)0.83;(2)0.399.
△U |
△I |
1.5-1.0 |
0.6 |
(2)由图2所示螺旋测微器可知,其示数为0mm+39.9×0.01mm=0.399mm;
故答案为:(1)0.83;(2)0.399.
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目