Предмет: Физика, автор: niklausmikaels

Чому осердя в трансформаторі зроблено не суцільним, а з тонких ізольованих пластин ?

Ответы

Автор ответа: sokolovvovikn
40
В каждой соседней пластине сердечника возникают вихревые токи противоположного направления, которые стремятся компенсировать друг друга. в результате этого сердечник трансформатора нагревается значительно слабее, чем при использовании сплошных сердечников.
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Sport, the 7 th form
1I v.
I. Complete the sentences with correct forms
of the verbs – to go, -to do, to play.
1. My friend … water polo in the swimming pool every Friday.
2. I prefer… sports in the sport section.
3. They… horse riding on the field in the village this Sunday.
4. They… exercises in the sport club at the moment.
II. Complete the sentences with correct forms of verbs:
1. I … (to participate) in competitions last week.
2. We… (to win) the Prize in skating this month.
3. My brother… (to compete) in skiing next Olympic Games.
4. ….you … (to train) in the gym now?
5. They enjoy … (to watch) the competition in boxing.
III. Make tag questions:
1. They are not training in the gym now, ….?
2. I cannot ski in winter, …. ?
3. She did aerobics every Saturday, …..?
4. There is a big swimming pool in our district,… ?
5. Let’s attend the Fitness Centre this evening,…?
6. I`m running in the part now, …?
7. Nick has trained fencing today, ….. ?
IV. Make all kinds of questions to the sentence:
They are climbing mountains in Carpathians now.
V. Write a letter to your friend about your favourite sportsman.
In the letter, give information about
- Kind of sport he/she goes;
- Some facts of his/her biography;
- His/ her victories in competitions/ championships
- What his/her experience teaches you
(Don’t forget about using the phrases: 1. I would like to tell you
about……2. I can say that…..3. Firstly…4. Secondly…5. Thirdly…6.
To cut my long story short….. )
Предмет: Химия, автор: diryavahuija