請完成以下兩小題：                                              ...

問題詳情：

請完成以下兩小題：                                                                                                    

（1）圖a中螺旋測微器讀數為                                                   mm．圖b中游標卡尺（遊標尺上有50個等分刻度）讀數為                                                                                                 cm．                          

（2）歐姆表“×1”檔的中值電阻為20Ω，已知其內裝有一節乾電池，乾電池的電動勢為1.5V．該歐姆表表頭滿偏電流為                                                                                                mA，要測2.5kΩ的電阻應選            檔．                                                                                                                            

【回答】

（1）1.998，1.094．（2）75，×100．

知識點：專題十三 中學物理實驗

題型：實驗,探究題