Предмет: Физика, автор: xxss8jjju

Показания миллиамперметра mA, в цепи, схема которого изображена на рисунке 1. отражены на шкале (рис. 3). Какие показания миллиамперметров mA и mA?
С дано,даю 100 баллов!

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Ответы

Автор ответа: xokyno
2

Дано:               |
mA=0,250 A    |
L= 40 Ом         |
R= 50 Oм         |
____________

Знайти:
mA_1 - ?\\mA_2 - ?


Розв'язання:
I=I_1+I_2
R+L=100%
\frac{R}{R+L}*100= 55,55%

\frac{L}{R+L}*100=  44,44%

mA_1=250 * 55,55% = 138.9 mA
mA_2=250 * 44,44% = 111.1 mA

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Итоговый тест за 7 класс Кузовлев

1. My mother wants….…………..to study well.

a) Me b) I c) My

2. We should reduce……………to protect nature.

a) paper b) forest c) using water

3. She is a brilliant student. She is good …..Chemistry.

a) In b) on c) at

4. He got “2”. He worked …….

a) good b) well c) hardly

5. She likes school very much. She is looking foreword……school.

a) For b) at c) to

6. We learn new words by………..

a) memory b) heart c) mind

7. I…… with my family

a) gone b) went c) goed

8. My father made me…………..early in the morning.

a) to get up b) getting up c) get up

9. All pupils must………….school uniforms.

a) wearing b) to wear c) wear

10. Our ………………lasts 15 minutes.

a) break b) lesson c) PE

11. We usually celebrate this day by……………….our teacher flowers and cards.

a) giving b) give c) given

12. ………………..is a person who helped people.

a) A charity b) A volunteer c) support

13. RSPCA gives a helping ……………to animals.

a) Leg b) stomach c) hand

14. An orphan is a person who has no…

a) parents b) contributions c) friends

15. To save the Earth we have to recycle ….

a) using electricity b) glass bottles c) using paper

16. My friend always ……….me when my classmate teas me

a) betrays b) gets together c) stands by

17. Friendship is a feeling ……. Can last forever.

a) whose b) who c) that

18. Can you help me? I am ……..troubles.

a) in b) at c) on

19. The forests … cut down.

a) is b) am c) are

20. The library is………..with wonderful books.

a) pack b) packed c) pick

21. Johann Gutenberg ……………..a printing machine.

a) invented b) reformed c) found

22. Yuri Gagarin was the first person……….the Earth.

a) to orbit b) to orbited c) to orbiting

23. Horatio Nelson was a skilful……..

a) playwright b) warrior c) politician

24. I like summer very much. I am looking forward ………the summer holidays.

a) to b) on c) in

25. …………………….is a good activity.

a) Plant trees b) Planting trees c) Planted trees

26. Our teacher want ……….to study well.

a) us b) we c) our

27. I am fond ………..music.

a) of b) on c) in

28. Boris Pasternak was the first Russian …………to get the Nobel Prize.

a) writer b) scientist c) film maker

29. The ecology situation is awful in our town. Litter is ………..

a) thrown away in b) cut down in streets c) damaged in streets

30. A true friend is a person who never ……………

a) betrays b) gets together c) stands by

Разбалловка:

30-28=5

27-22=4

21-12=3

11 и меньше =2
6 лет назад