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  • Hi. It's Mr. Andersen and this is AP physics essentials double O 7. It is on positive and

    嗨,我是安德森先生,這是AP物理要點雙O 7。它是在正和

  • negative charges. Imagine I take a balloon that does not have a charge and I rub it on

    負電荷。想象一下,我拿一個沒有電荷的氣球,然後我把它擦在

  • my head. I am now giving it a charge. So I could move it up to something neutral, like

    我的頭。我現在給它充電。所以我可以把它移到一些中性的東西,像...

  • a wall and if I let it go it will just stay there. Now imagine if I take another balloon

    一堵牆,如果我讓它走,它就會留在那裡。現在想象一下,如果我拿另一個氣球

  • and I charge that in a similar matter. It should have the same charge as the balloon.

    和我充電,在類似的事情。它的電荷應該和氣球一樣。

  • And so if I hold it up next to it and let it go, what is going to happen? It will actually

    所以如果我把它舉在旁邊,然後讓它走,會發生什麼?它實際上會

  • be repelled by that object. And so scientists speculated there are two types of charges.

    被該物體所排斥。於是科學家們推測有兩種收費方式。

  • And we call those positive and negative charges. And so an electric charge can be positive

    我們稱這些為正電荷和負電荷。所以一個電荷可以是正電荷

  • or negative. If we have a neutral object it is going to have an equal amount of each of

    或負數。如果我們有一箇中性的物體,它將有相等數量的每一個的

  • those different charges. But if it is a charged object, like a balloon, then it is going to

    那些不同的電荷。但如果它是一個帶電的物體,比如氣球,那麼它就會... ...

  • have differences in the number of electric charges that it has. If it is a negatively

    有差異,它的電荷數。如果它是一個負的

  • charged object it is going to have more of the negative charges. And if it is a positively

    帶電的物體會有更多的負電荷。如果它是一個正電荷

  • charged object it is going to have more of the positives. Now let's say I bring two objects

    帶電的物體,它將有更多的正極。現在,讓我們'說,我帶來兩個物體。

  • next to each other that have different charges. What is going to happen? There will be an

    旁邊有不同的費用。會發生什麼呢?會有一個

  • attractive force between the two. But if we take two objects that have the same charge

    兩者之間的吸引力。但如果我們把兩個電荷相同的物體

  • and bring them next to each other, that could be both positive or both negative, they are

    並把它們挨在一起,可以是正面的,也可以是負面的,它們是

  • going to repel each other. Now why did the balloon stick to the wall if the wall did

    會互相排斥。如果牆面上有氣球,為什麼氣球會粘在牆上?

  • not have a charge? I had not done anything to it? Well if you move a charge up to a neutral

    沒有收費?我沒有對它做任何事情?好吧,如果你把電荷移到一箇中性點上

  • object what it can do is it can polarize that object. It can move some of the charges to

    它能做的就是使該物體極化。它可以將一些電荷移動到

  • one end. And what it does is create a similar charged object. So an electric charge can

    一端。而它所做的就是創造一個類似的帶電物體。所以電荷可以

  • either be positive or negative. And so if we are looking at a neutral object, how many

    要麼是正的,要麼是負的。所以如果我們看到的是一箇中性物體,有多少個

  • of those charges are we are going to have in that object? An equal amount of each. Now

    我們要在該物體上裝多少炸藥?每種電荷的數量相等。現在...

  • let's say we take a charged object, a charged object like that balloon, what are we going

    讓我們說,我們把一個帶電的物體,一個帶電的物體 像氣球,我們要什麼

  • to have? We are going to have more of a positive charge, if it is a positively charged object.

    要有?如果是帶正電的物體,我們要多帶正電。

  • Or if it is a negatively charged object we are going to have more of the negative charges

    或者說如果是帶負電的物體,我們會有更多的負電荷。

  • inside it. Now let's say we take two neutral objects, so two balloons that we have not

    內。現在,讓我們拿兩個中性物體,所以兩個氣球,我們沒有。

  • charged and we move them right next to each other. What is going to happen if we let them

    充電,我們把它們移到旁邊。如果我們讓它們

  • go? Nothing is going to happen. There is going to be no attraction between the two because

    去嗎?什麼都不會發生。兩人之間不會有任何吸引力,因為...

  • the charges are equally distributed. Let's say we take two objects that two objects that

    的電荷是平均分佈的。比方說,我們取兩個物體,兩個物體,即

  • have opposite charge. So the one on the left has a negative charge, the one on the right

    有相反的電荷。所以左邊的那個帶負電,右邊的那個帶

  • is going to have a positive charge. If I let these go what is going to happen? There will

    是會有一個正電荷。如果我放了這些東西,會發生什麼?會發生什麼?

  • be an attractive force between the two. Opposites attract. Let's say we take two objects that

    是兩者之間的一種吸引力。對方吸引。比方說,我們把兩個物體的

  • have the same charge and move them next to each other. In this case they both have negative

    具有相同的電荷,並將它們移到對方旁邊。在這種情況下,它們都有負電荷

  • charges, what will happen when I let go? They are going to push away from each other. Same

    我一放手,會發生什麼?他們會互相推開。一樣

  • thing if they are both positive. If I let them go, they are going to move away from

    的事情,如果他們都是正。如果我放他們走,他們就會遠離。

  • each other. Now let's say we take a charged object, so that is the one on the left and

    彼此之間。現在讓我們取一個帶電的物體,所以就是左邊的那個物體,然後。

  • then we have a neutral object, that is going to be the one on the right, watch carefully

    然後,我們有一箇中立的對象, 這將是一個在右邊,仔細觀察。

  • what happens as these two come together. So as I move the charged object towards the neutral

    當這兩者結合在一起時會發生什麼。所以當我把帶電的物體移向中性點的時候。

  • object what it is doing is it is polarizing those charges. It is moving the negative charges

    它的作用是使這些電荷極化。它正在移動負電荷

  • farther away. Why? Because they are being repelled by these negative charges. The positive

    更遠的地方。為什麼?因為它們被這些負電荷所驅趕。正電荷

  • charges are moving towards it. And so now there is an attraction between this polarized,

    電荷正向它移動。所以現在這個極化之間就有了吸引力。

  • what used to be neutral object. And so PHET makes a wonderful simulation that kind of

    過去是中性物體。所以PHET做了一個奇妙的模擬,那種

  • walks you through that. So what we have got here is the address down below and I will

    走你通過。所以,我們在這裡得到的是下面的地址,我會。

  • put a link in the video description as well. So what I am going to do is take a balloon

    把鏈接在視頻描述。所以,我要做的是拿一個氣球

  • and I can move that balloon around. And if I let it go it just stays where it is. But

    我可以移動氣球周圍。如果我讓它走,它只是停留在原地。但是...

  • let's say I want to charge it what I can do is I can rub it on a sweater like this. And

    讓'說我想給它充電我可以做的是我可以把它擦在一件毛衣上,像這樣。擦在毛衣上

  • now I am applying a charge to that balloon so when I let it go it is going to go right

    現在我在氣球上加了電,所以當我讓它走的時候,它就會走得很遠。

  • over to the sweater. And so if we move it next to the wall and let it go it will stay

    到毛衣。所以如果我們把它移到牆邊,讓它走,它就會停留下來

  • there. But if I get it close to the sweater then it is going to be attracted. And so let's

    在那裡。但是如果我把它靠近毛衣,那麼它是會被吸引的。所以讓's

  • reset this whole thing and look at the charges now. So you can see that all of these objects

    重置這一切,看看現在的電荷。所以你可以看到,所有這些對象

  • are now neutral. They have equal amounts of charge. But as I rub it on the sweater what

    現在是中性的。它們的電荷量相等。但是當我把它擦在毛衣上的時候...

  • I am really doing is I am pulling those negative charges off the sweater. And now they are

    我真正做的是把毛衣上的負電荷拔掉。現在它們是

  • on the balloon. So now that balloon is a negatively charged object. And the sweater is a positively

    在氣球上。所以現在氣球是帶負電荷的物體。而毛衣是一個帶正電的

  • charged object. So if I let it go it moves right next to it. Now watch what happens when

    帶電的物體。所以如果我讓它走,它就會在旁邊移動。現在看看發生了什麼

  • I move it next to the wall you can see it is polarizing this neutral object of the wall.

    我把它移到牆的旁邊,你可以看到它正在極化牆的這個中性物體。

  • So I am not transferring charges. But if I move it next to it it is attracted. Let's

    所以我沒有轉移費用。但如果我把它移到旁邊,它就會被吸引。讓'的

  • get two balloons now and remove the wall. So let me add negative charges on this green

    現在拿兩個氣球,把牆拆掉。所以讓我在這個綠色的氣球上加負電荷

  • balloon right here. And now let me add more negative charges on this yellow balloon and

    氣球就在這裡現在讓我在這個黃色的氣球上加更多的負電荷,然後...

  • what is going to happen? Well as I move that balloon next to the other balloon these are

    會發生什麼?當我把那個氣球移到另一個氣球旁邊時... ...這些都是...

  • like charges and so you can see that they are repelling each other. And it eventually

    就像收費一樣,所以你可以看到它們是互相排斥的。最終

  • would like to go back to that sweater. Okay. So did you learn the following, to explain

    想回到那件毛衣上。好吧,那你有沒有學到以下幾點,來解釋一下

  • a two-charge model of electric charge? Again if it is a neutral object we are going to

    電荷的二電荷模型?同樣如果它是一箇中性物體,我們就會

  • have equal amounts of each of those two different charges. Did you learn that the distribution

    在這兩種不同的費用中,每一種都有相等的金額。你知道嗎?

  • of those charges tells us if the object is going to be positively charged or negatively?

    這些電荷的多少告訴我們物體是帶正電還是帶負電?

  • You can see this would be a negatively charged object here. And then finally did you learn

    你可以看到這裡會是一個帶負電的物體。然後最後你有沒有學會

  • to explain how the polarization of the electric charge, or separation of that charge in a

    解釋電荷的極化,或該電荷在某一領域的分離是如何進行的。

  • neutral object can lead to an attraction? So we have an attractive force here between

    中性物體可以導致吸引力?所以,我們這裡有一個吸引力之間

  • charged balloon and what used to be a neutral wall. I hope so. And hope that was helpful.

    帶電的氣球和曾經的中性牆。希望如此希望這對你有幫助。

Hi. It's Mr. Andersen and this is AP physics essentials double O 7. It is on positive and

嗨,我是安德森先生,這是AP物理要點雙O 7。它是在正和

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A2 初級 中文 電荷 物體 氣球 毛衣 吸引力 收費

安德森物理:正電和負電 (Positive and Negative Charge)

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    Cheng-Hong Liu 發佈於 2015 年 02 月 23 日
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