五.綜合題 查看更多

 

題目列表(包括答案和解析)

現(xiàn)準(zhǔn)備用“伏安法”測(cè)量額定電壓為2.5V的小燈泡的電阻,實(shí)驗(yàn)室能提供的實(shí)驗(yàn)器材有:

A.待測(cè)小燈光L(其正常工作時(shí)的電阻值約為10Ω);

B.二節(jié)新的干電池串聯(lián)(每節(jié)干電池的電壓為1.5V);

C.電壓表一個(gè)(量程為0~3V,0~15V,電阻為5KΩ);

D.電流表一個(gè)(量程為0~0.6A,0~3A,電阻為5Ω);

E.滑動(dòng)變阻器R0(阻值為0~50Ω,額定電流為1A);

F.開關(guān)S一個(gè),導(dǎo)線若干.則:

(1)如果使用上述器材來測(cè)量小燈泡的電阻,那么,當(dāng)小燈泡正常工作時(shí),該電路中的電流約為   A,因此,電流表的量程應(yīng)選0~   A。

(2)由于電流表和電壓表都有一定的電阻,嚴(yán)格來說將它們接入電路后,對(duì)電路都要產(chǎn)生一定的影響。那么,為了減少誤差,在甲、乙所示的電路圖(未畫完)中,最好選 

(選填“甲”或“乙”)。 新 課 標(biāo) 第 一網(wǎng)

(3)根據(jù)以上選擇的電路圖,在丙圖中用鉛筆畫線代替導(dǎo)線進(jìn)行連線,使之成為能比較精確地測(cè)量出小燈泡電阻的電路(其中,部分導(dǎo)線已連接)。

(4)在實(shí)驗(yàn)中,某同學(xué)設(shè)計(jì)的實(shí)驗(yàn)報(bào)告及實(shí)驗(yàn)記錄數(shù)據(jù)如下表所示。

實(shí)驗(yàn)名稱

用“伏安法”測(cè)量小燈泡的電阻

實(shí)驗(yàn)?zāi)康?/p>

練習(xí)使用電流表和電壓表測(cè)量小燈泡的電阻

實(shí)驗(yàn)步驟

a、按照電路圖連接電路,調(diào)節(jié)滑動(dòng)變阻器的滑片P,使電路中的  最小。

b、閉合開關(guān),調(diào)節(jié)滑片P,使小燈泡兩端的電壓達(dá)到   V,然后,測(cè)量從額定電壓開始逐次     (選填“降低”或“升高”),獲得幾組數(shù)據(jù)。

c、根據(jù)測(cè)出的電壓值和電流值,求出小燈泡的電阻。

實(shí)驗(yàn)記錄

電壓U/V

電流I/A

電阻R/Ω

2.5

0.26

9.6

2.0

0.24

8.3

1.5

0.2

7.5

1.0

0.15

6.7

①將實(shí)驗(yàn)步驟中的空格填寫完整。

②從實(shí)驗(yàn)記錄中可以看出,存在明顯錯(cuò)誤的記錄數(shù)字是     。

③根據(jù)實(shí)驗(yàn)記錄數(shù)據(jù),采用“描點(diǎn)法”在如圖所示的坐標(biāo)系中,作出小燈泡的U—I圖像。

四、計(jì)算題(本題共2小題,共12分。解答時(shí)應(yīng)寫出必要的文字說明、公式和重要的演算步驟。只寫出最后結(jié)果的不能得分。有數(shù)值運(yùn)算的題,答案中必須寫出數(shù)值和單位。)

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    (說明:若你認(rèn)為“方案”可行,則選A解答,若你認(rèn)為“方案”不可行,則選B解答)

一、不定項(xiàng)選擇題(本題共6小題,每小題2分,共12分。在每小題給出的四個(gè)選項(xiàng)中,至少有一個(gè)選項(xiàng)是符合題目要求的,全部選對(duì)的得2分,只有一個(gè)正確答案的得1分,有選錯(cuò)或不答的得0分。)[來源:全品高考網(wǎng) GK.CANPOINT.CN]

【題文】下列關(guān)于電磁現(xiàn)象的說法中,正確的是

A.導(dǎo)線周圍始終存在磁場(chǎng)

B.發(fā)電機(jī)是根據(jù)電磁感應(yīng)現(xiàn)象制成的

C.電磁鐵磁性的強(qiáng)弱與電磁鐵線圈的匝數(shù)有關(guān)

D.只要導(dǎo)體在磁場(chǎng)中運(yùn)動(dòng),就會(huì)產(chǎn)生感應(yīng)電流

 

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第二節(jié) (共5小題;每小題2分,滿分10分)
根據(jù)短文內(nèi)容,從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。
Why do some people have many friends while others do not? ___71___ However, it is not so. Let’s look at two psychological experiments which will give you the key to happy interpersonal relations.
The first experiment is called the “Hawthorne effect” after Hawthorne, Illinois(伊利諾斯[美國州名]), where the experiment took place. A group of psychologists examined the work patterns of two groups of workers in the Western Electric Company. ____72_____. The psychologists changed the working conditions for one group twice but left the other group alone. They were surprised to find that productivity increased on both occasions and in both groups. They concluded that the increase in productivity came from the attention given to the workers by the management. It had increased their motivation and so they had worked harder. In other words, if you take an interest in others, they will want to please you and you will have good relations with them.
___73___. After Martin Luther King, Jr was killed in 1960s, a teacher, Jane Elliott, living in an all- white town decided to help her class of young children understand why the Civil Rights Movement had been necessary in America.
She divided the class into two groups: one with blue eyes and other with brown eyes. Other eye colors such as hazel or green were excluded from his exercise. Then she told the class that brown-eyed people were cleverer than blue-eyed ones because of an agent(化學(xué)作用) for brown color found in their blood. Blue-eyed people were stupid, lazy and not to be trusted. Jane Elliott did not need to say any more. The brown-eyed students quickly got used to their new role as the leaders of the class. The blue-eyed students became quiet and withdrawn. Then she discovered something very interesting. Four poor brown-eyed readers began to read fluently in a way they had never done before. ___74___. So if you want to be successful and happy, take an interest in others whether they are your classmates or workmates. Congratulate them on their success and sympathize with them in their troubles. ___75___.
A.Before the experiment the management talked to both groups of workers and explained that they wanted to find the best working environment for them.
B.Remember that the way you treat others will decide their attitude and behavior to you.
C.The second experiment shows what happens to personal relations if you are rude to or ignore others.
D.The ones who have more friends usually are those who care about others.
E. Jane Elliott had shown that the way people are treated affects not only their behavior but also their confidence and their performance.
F. You may even imagine that this ability was something they were born with because it seems so effortless to them.
G. The second experiment tells us what teachers said had a great effect on the students.

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計(jì)算題(本題共3小題,共20分)

(6分)某電熱水器,額定功率為2000W。當(dāng)熱水器正常工作70min時(shí),可將50kg的水從

  20℃加熱到58~C。水的比熱容為4.2×103 J/(kg·℃)。試求:

  (1)這50kg水吸收的熱量是多少?

  (2)熱水器消耗的電能是多少?

  (3)熱水器的效率是多少?

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    (說明:若你認(rèn)為“方案”可行,則選A解答,若你認(rèn)為“方案”不可行,則選B解答)

一、不定項(xiàng)選擇題(本題共6小題,每小題2分,共12分。在每小題給出的四個(gè)選項(xiàng)中,至少有一個(gè)選項(xiàng)是符合題目要求的,全部選對(duì)的得2分,只有一個(gè)正確答案的得1分,有選錯(cuò)或不答的得0分。)

【題文】下列關(guān)于電磁現(xiàn)象的說法中,正確的是

A.導(dǎo)線周圍始終存在磁場(chǎng)

B.發(fā)電機(jī)是根據(jù)電磁感應(yīng)現(xiàn)象制成的

C.電磁鐵磁性的強(qiáng)弱與電磁鐵線圈的匝數(shù)有關(guān)

D.只要導(dǎo)體在磁場(chǎng)中運(yùn)動(dòng),就會(huì)產(chǎn)生感應(yīng)電流

 

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