初  三  物  理

一、单项选择题

题号 1 2 3 4 5 6 7 8 9 10 11 12

答案 D D B B C B D C A B C D

二、多项选择题

题号 13 14 15  16

答案 BC AC BC ABC

三、填空题

题号 17 18 19 20 21 22 23

答案 排斥 36 G 15 6 4 4:5

四、实验与探究题

题号 答案

24 1615                                                          (2分)

25 2.4                                                            (2分)

26 192                                                           (2分)

27 C                                                             (2分)

28 红                                                            (2分)

29                                                            (2分)

30 ⑴滑动变阻器                                                   (1分)

⑵电流大小                                                     (1分)

⑶吸引大头针的个数                                             (1分)

31 1:2                                                            (2分)

32 ⑴                                                             (2分)

⑵A                                                           (1分)

⑶0.84                                                        (1分)

33 温度计示数的变化;使电流和通电时间相同                         (2分)

34 ⑴AD                                                          (2分)

⑵AB                                                          (2分)

35 U=I•5Ω                                                      (2分)

36 ⑴