初二物理英语6.3.doc

一鸣辅导班（初二物理 6.3）1、如图所示，电源电压为3V，闭合开关，电压表示数为2V，则（ ）A、灯泡L1两端电压为2V B、灯泡L2两端电压为2VC、灯泡L1两端电压为3V D、灯泡L2两端电压为1V 2如图右图5所示，电源电压保持不变，开关S从闭合到断开时，则电压表应该是 A示数变为0 B有示数，测量的是电源电压C有示数，测量的都是灯两端的电压 D示数将变大，但无法测量3、如图所示的电路中，电源电压保持不变当开关S1断开、S2闭合时，电压表的示数为4.5V；当开关S1闭合、S2断开时，电压表的示数为3V，则L1和L2两端的电压分别为（ ）A3V和4.5V B1.5V和4.5V C3V和1.5V D1.5V和3V 4导体的电阻大小与下列因素无关的是（）A导体的长度 B导体的横截面积C导体的材料 D导体的两端电压5关于导体的电阻，下列说法中正确的是（ ）A锰铜丝的电阻比铜丝的电阻大B粗细相同的导线，长的电阻较大C长短相同的导线，细的电阻较大D同种材料制成的长短一样的两条导线，粗的电阻较大6. 如图所示电路，当滑动变阻器的滑动触头P自左向右移动时，图中电压表和电流表的示数U和I变化情况是（ ）A. U减小，I减小 B. U增大，I增大C. U增大，I减小D. U减小，I增大7. 在电阻器两端加12V的电压时，通过它的电流是1.2A，如果在它的两端加36V的电压时，此电阻器的阻值和通过它的电流分别为（ ）A. 10，3.6A B. 30，3.6AC. 30，1.2A D. 10，1.2A7. 有两只电阻，阻值分别为R1=40、R2=60，它们串联在某一电路里，则通过两者的电流之比I1：I2= ，电压之比U1：U2= 。8. 某一段电路中串联一只2的电阻后，电路中的电流变为原来的一半，则原来电路中的电阻为，若要电路中的电流降为原电流的 ，则还需串联一只的电阻。10把R12的电阻和R24电阻串联后接在电源上，已知R1两端的电压是1V。求：（1）电源电压（2）电阻R1的电功率 （3）串联电路总的电功率11一只灯泡接到220V的电路中，10min消耗的电能是2.4104J，求：(1)灯泡的电功率是多大？（2）灯泡中通过的电流是多大？（3）灯丝的电阻是多少？（4）如果把这只灯泡该接到110 V的电路中，灯泡的功率多大？( ) 1.If it _tomorrow, we _go to the park. A. rains, wont B. will rain, wont C. rains, dont D. rains, dont go( )2. Could you lend me your bike? Of course. _ A. You could B. Give you C. Thats all right D. With pleasure( )3.Im _at reading than listening A. good B. well C. better D. best( )4.He didnt go there. I didnt go there _ A. too B. also C. either D. neither( )5.You shouldnt argue _ your parents A. with B. about C. for D. at( )6. They will be back _ A. for an hour B. after an hour C. an hour ago D. in an hiur( )7.Would you mind doing the dishes? _ A. Certainly B. Sorry, I wont C. Ok, I will do them D. Please dont( )8.What _ you ? A, annoy B annoys C. is annoyed D. annoies( )9. How about _a scarf? A .buy B. buying C. bought D. to buy( )10 Why _ go to the park? A. not B. dont C. do D. didnt( ) 11. Have you ever _ an aquarium? A. gone B. gone to C. been to D. been( ) 12 I dont like cats. _does he A. So B. Either C. Neither D. Also( )13.Tom is ready for the party, _? A. is he B. isnt Tom C. isnt he D. is Tom( )14_ have you been swimming? Two hours A. When B. Where C. How long D How many( )15. Could you make _ for me?A, room B. rooms C. places D. a space There was once a man who kept ten monkeys as pets as he was very fond of themEvery morning the monkeys would climb up and down the trees or swing from one branch（树枝）to another in his backyardAfter that，he would feed them bananas One morning the man said to the monkeys，“We have very few bananas left todayFor breakfast I shall give each of you two bananas and four for dinner” When the monkeys heard this，they looked very unhappyThey refused（拒绝）to take the bananas that the man was handing out to them “Very well，thenYou shall have four bananas in the morning and two for dinner，”the man said The monkeys looked at one anotherThen they jumped up and down happily，nodding their headsThey took the big，yellow bananas from the man and started eating 21The man kept the monkeys because he _ Aliked them Bsold monkeys as pets Cwanted them to work for him Dhad many banana trees in his backyard 22The man fed the monkeys _ Atwice a day Bin the afternoon Conly when they were hungry Dbefore they climbed up and down the trees 23At first the man wanted to give the monkeys _ bananas for dinner Aone Btwo Cthree Dfour 24The monkeys were unhappy and they _ Aran