Предмет: Физика, автор: Farge

2.   У коло ввімкнені послідовно три провідники опорами 5, 6 і 12 Ом відповідно. Яка сила струму в колі і яку напругу прикладено до кінців кола, якщо напруга на другому провіднику 1,2 В?

Ответы

Автор ответа: o2784913
56

I=I1=I2=I3

I2=U2/R2

I2=1,2/6=0,2 (A)

U=IR

R=5+6+12=23 (Ом)

U=0,2*23=4,6 (B)

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1.He  is at home,.......................?

2.She is ill,...........................?

3.They are in the fifth form,..............................?

4.You are a pupil,........................?

5.He is ten,.........................?

6.He isn"t hungry,...........................?

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13.Mr Blak is yuonger than Mr Smith,........................?

14.Helen"s bike is older than Kete"s bike,..........................?

15.The apple is testerthan the pear,..................?

16.Mary isn"t at school,.........................?

17.Tom isn"t here today,........................?

18.Kate"s son isn"t a pupil,.....................?

19.It isn"t cold today,.................?

20.Maths is difficult,..............?

21.He was in London last autumn,..............................?

22.She was at the zoo last  Suturday,.....................?

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27.Robert"s grandparent weren"t in Great Britain last year,...................?

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34.There is book on the desk,.......................?

35.There is blackboard there,........................?

36.There is an exercise-book,.......................?

37.It is your exercise-book,.............................?

38.The cake is on the table,...........................?

39.There is  a cake on the table,...................?

40.The ball is under the table,.......................?  

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