请完成以下两小题：                                              ...

问题详情：

请完成以下两小题：                                                                                                    

（1）图a中螺旋测微器读数为                                                   mm．图b中游标卡尺（游标尺上有50个等分刻度）读数为                                                                                                 cm．                          

（2）欧姆表“×1”档的中值电阻为20Ω，已知其内装有一节干电池，干电池的电动势为1.5V．该欧姆表表头满偏电流为                                                                                                mA，要测2.5kΩ的电阻应选            档．                                                                                                                            

【回答】

（1）1.998，1.094．（2）75，×100．

知识点：专题十三 中学物理实验

题型：实验,探究题